From 9f64aba104afe0585f98a8f7d89397bce597815a Mon Sep 17 00:00:00 2001 From: frogzorz Date: Wed, 16 Sep 2026 15:56:19 -0400 Subject: [PATCH 01/14] create first draft set up necessary files for website to function - very rough draft, more data and narrative to come --- css/index.css | 219 ++++++++++++++++++ data/city_year.json | 90 ++++++++ data/metadata.json | 43 ++++ data/project1_tracts.geojson | 415 +++++++++++++++++++++++++++++++++++ index.html | 70 ++++++ js/index.js | 154 +++++++++++++ js/map-styles.js | 35 +++ js/slidedeck.js | 41 ++++ package.json | 5 +- 9 files changed, 1071 insertions(+), 1 deletion(-) create mode 100644 css/index.css create mode 100644 data/city_year.json create mode 100644 data/metadata.json create mode 100644 data/project1_tracts.geojson create mode 100644 index.html create mode 100644 js/index.js create mode 100644 js/map-styles.js create mode 100644 js/slidedeck.js diff --git a/css/index.css b/css/index.css new file mode 100644 index 00000000..3ec9f8d1 --- /dev/null +++ b/css/index.css @@ -0,0 +1,219 @@ +body { + margin: 0; + border-width: 0; + box-sizing: border-box; + height: 100vh; + + font-family: 'Source Sans Pro', sans-serif; +} + +.map-container { + position: sticky; + top: 0; + height: 100vh; + z-index: 0; + width: calc(100% - 28rem); +} + +.map { + height: 100%; + background: #f2f2ef; +} + +.slide-section { + position: relative; + margin-top: -90vh; + z-index: 100; + pointer-events: none; + border-bottom: 1px solid rgb(0 0 0 / 10%); +} + +.slide { + margin-top: 90vh; + margin-bottom: 90vh; + margin-left: auto; + margin-right: 2rem; + padding: 1rem; + box-shadow: -0.5rem 0 1rem rgba(0 0 0 / 50%); + border: 1px solid gray; + border-radius: 0.5rem; + pointer-events: initial; + + width: 25rem; + + background-color: white; + color: black; + box-sizing: border-box; + line-height: 1.55; +} + +.slide:first-child { + margin-top: 0; +} + +.slide:last-child { + margin-bottom: 40vh; +} + +.slide-controls { + display: flex; + justify-content: space-around; + align-items: center; + column-gap: 0.5rem; + + width: 100%; +} + +.slide-nav-button { + transition: all 0.1s; + + padding: 0; + margin: 1rem; + width: 4rem; + height: 3rem; + border: 1px solid #888; + border-radius: 0.25rem; + + background-color: #eee; + font-size: 1.5em; +} + +.slide-nav-button:hover { + background-color: #444; + color: #fff; +} + +.slide-nav-select { + min-width: 0; +} + +.map-legend { + position: absolute; + bottom: 2rem; + right: 0.75rem; + z-index: 500; + max-width: 17rem; + padding: 0.65rem; + border: 1px solid #aaa; + background: white; + font-size: 0.8rem; +} + +.map-legend:empty { + display: none; +} + +.map-legend p { + margin: 0.4rem 0; +} + +.map-legend ul { + margin: 0; + padding: 0; + list-style: none; +} + +.legend-swatch { + display: inline-block; + width: 1rem; + height: 0.7rem; + margin-right: 0.4rem; + border: 1px solid #555; +} + +.eyebrow { + font-size: 0.8rem; + color: #555; +} + +.error { + color: #9c2020; + font-weight: bold; +} + +a { + color: #145b80; +} + +:focus-visible { + outline: 3px solid #0072b2; + outline-offset: 3px; +} + +.skip-link { + position: absolute; + top: -5rem; + z-index: 2000; + padding: 0.5rem; + background: white; +} + +.skip-link:focus { + top: 0; +} + +summary { + cursor: pointer; + margin-top: 1rem; +} + +.table-scroll { + max-height: 24rem; + overflow: auto; +} + +table { + border-collapse: collapse; + font-size: 0.8rem; +} + +th, +td { + padding: 0.4rem; + border: 1px solid #ccc; + text-align: left; +} + +@media (width <= 800px) { + .map-container { + width: 100%; + height: 52vh; + z-index: 200; + display: flex; + flex-direction: column; + } + + .map { + flex: 1; + min-height: 0; + height: auto; + } + + .slide-section { + margin-top: 0; + } + + .slide { + width: calc(100% - 2rem); + margin-right: 1rem; + margin-left: 1rem; + margin-top: 55vh; + margin-bottom: 55vh; + scroll-margin-top: 54vh; + } + + .map-legend { + position: static; + flex: 0 0 8.5rem; + box-sizing: border-box; + overflow: auto; + max-width: none; + font-size: 0.65rem; + } + + .map-legend ul { + display: grid; + grid-template-columns: 1fr 1fr; + gap: 0.15rem 0.5rem; + } +} diff --git a/data/city_year.json b/data/city_year.json new file mode 100644 index 00000000..f096f9be --- /dev/null +++ b/data/city_year.json @@ -0,0 +1,90 @@ +[ + { + "year": 2015, + "total": 1271, + "fatal": 233, + "nonfatal": 1038, + "period": "baseline", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2016, + "total": 1319, + "fatal": 262, + "nonfatal": 1057, + "period": "baseline", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2017, + "total": 1250, + "fatal": 259, + "nonfatal": 991, + "period": "baseline", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2018, + "total": 1438, + "fatal": 302, + "nonfatal": 1136, + "period": "baseline", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2019, + "total": 1464, + "fatal": 311, + "nonfatal": 1153, + "period": "baseline", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2020, + "total": 2245, + "fatal": 449, + "nonfatal": 1796, + "period": "peak", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2021, + "total": 2332, + "fatal": 507, + "nonfatal": 1825, + "period": "peak", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2022, + "total": 2255, + "fatal": 476, + "nonfatal": 1779, + "period": "peak", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2023, + "total": 1660, + "fatal": 376, + "nonfatal": 1284, + "period": "recent_decline", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2024, + "total": 1082, + "fatal": 228, + "nonfatal": 854, + "period": "recent_decline", + "completeness_flag": "complete by month/date check" + }, + { + "year": 2025, + "total": 940, + "fatal": 208, + "nonfatal": 732, + "period": "recent_decline", + "completeness_flag": "complete by month/date check" + } +] diff --git a/data/metadata.json b/data/metadata.json new file mode 100644 index 00000000..f21954e2 --- /dev/null +++ b/data/metadata.json @@ -0,0 +1,43 @@ +{ + "analysis_title": "The changing geography of Philadelphia shooting violence: Project 1", + "data_extraction_date": "2026-05-21", + "maximum_event_date": "2025-12-31", + "outcome_definition": "Shooting-victim events; fatal and nonfatal outcomes retained separately", + "officer_involved_exclusion": "Records coded Y for officer_involved are excluded; unknown status is excluded and reported", + "analytic_years": { + "start": 2015, + "end": 2025 + }, + "period_definitions": { + "baseline": "2015-2019", + "peak": "2020-2022", + "recent_decline": "2023-2025" + }, + "geographic_vintage": "2020 Census tracts; 2020 Census block groups used only for sensitivity", + "acs_vintage_and_variable": "2020-2024 ACS 5-year B01003_001 total population estimate and margin of error", + "rate_definition": "period_count / (fixed total population * years in period) * 10000; area-level place-based burden, not resident incidence", + "primary_method": "Fixed 2015-2019 upper-quartile tract annualized burden benchmark", + "baseline_percentile": 0.75, + "benchmark_rate_10k": 13.5972031786152, + "quantile_type": 7, + "threshold_inclusion": "greater than or equal to unrounded cutoff; zero-event positive-population tracts included", + "threshold_comparison_periods": "same cutoff for 2020-2022 and 2023-2025; not recalculated within each period", + "supplementary_gistar_implementation": "spdep 1.4.2 localG_perm; conditional greater alternative; focal unit fixed; one-sided high-tail probability derived from the reported folded permutation probability and standardized-deviate sign", + "supplementary_spatial_weights": "first-order queen contiguity, binary, focal geography explicitly included", + "supplementary_permutation_count": 9999, + "supplementary_hotspot_q_threshold": 0.1, + "supplementary_threshold_revision": "Exploratory post-map-review relaxation from BH q < 0.05 to q < 0.10; original threshold retained in comparison table", + "supplementary_random_seed": 20250904, + "supplementary_fdr_method_and_threshold": "Benjamini-Hochberg within period; q < 0.10 plus positive Gi* standardized deviate", + "transition_definitions": { + "persistent": "Persistently elevated: at or above the fixed benchmark in both periods", + "previously": "Previously elevated: at or above the benchmark only in 2020-2022", + "newly": "Newly elevated: at or above the benchmark only in 2023-2025", + "below": "Consistently below: below the benchmark in both periods", + "unavailable": "classification cannot be calculated because of denominator or geometry problems" + }, + "planned_social_measures": ["ACS economic, housing, education, age, and racial/ethnic composition", "CDC/ATSDR SVI overall and theme-specific measures, with explicit vintage and ranking reference"], + "known_limitations": ["75th percentile is a descriptive baseline reference, not a clinical or significance threshold", "classification ignores uncertainty around rates and ACS population; low-count and denominator flags retained", "descriptive spatial epidemiology; no causal or predictive interpretation", "event location may differ from victim residence", "a fixed ACS denominator does not capture all population change during 2015-2025", "local statistics depend on geography, spatial weights, sparse counts, and multiple-testing decisions", "below benchmark is not evidence that shooting violence is absent", "source completeness checks cannot detect every reporting delay or omission"], + "source_filenames": ["data/raw/shootings_2272_2026-05-21.gpkg", "tract_2020_acs2024_population.gpkg", "block_group_2020_acs2024_population.gpkg"], + "generation_timestamp": "2026-09-14 05:01:39 UTC" +} diff --git a/data/project1_tracts.geojson b/data/project1_tracts.geojson new 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violence — first data preview + + + + + + + + +
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Project 1 preview

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Philadelphia shooting violence: decline and persistent burden

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more narrative TK

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Loading export…

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2020–2022: peak period

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Colors show shooting events per 10,000 resident population per year.

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Scroll to compare the next period using the same color bins. Gray = rate is unavailable, not that no shootings occurred.

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2023–2025: the recent decline

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The map now displays recent-period rates

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Note: both periods use a fixed 2020–2024 ACS population denominator, which is good for comparability but doesn't capture population change over time

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The legend ranges are not thresholds of elevated burden

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Where elevated burden persisted

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We classified each tract against one historical benchmark: the 75th percentile of 2015–2019 tract rates, approximately 13.60 events per 10,000 population per year

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Transition counts will appear after the data load.

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“Previously elevated” means below this benchmark in the recent period, not that violence disappeared. With a fixed benchmark and widespread declines, we do not expect many newly elevated tracts

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tktktk - warn against causal inference, this is purely descriptive

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+ Methods, sources, and aggregate data +

2020 Census tracts; pooled three-year counts divided by fixed population × 3, multiplied by 10,000. Officer-involved shootings were excluded. Event location =/= residence. Zero or missing populations produce unavailable rates

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Sources: Philadelphia shooting-victim data (extract 2026-05-21); US Census Bureau 2020 geography and 2020–2024 ACS five-year total population

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Download tract GeoJSON · Full metadata · Citywide annual counts

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+ Read tract values without using the map +
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Events per 10,000 resident population per year; officer-involved shootings excluded
Tract GEOIDPeak countPeak rateRecent countRecent rateTransition
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+
+
+ + + + + diff --git a/js/index.js b/js/index.js new file mode 100644 index 00000000..3c1f09cd --- /dev/null +++ b/js/index.js @@ -0,0 +1,154 @@ +import { SlideDeck } from './slidedeck.js'; +import { rateBins, unavailableColor, transitionColors, tractStyle } from './map-styles.js'; + +const status = document.querySelector('#load-status'); +const legend = document.querySelector('#map-legend'); +const slides = document.querySelectorAll('.slide'); +const views = { + 'peak': { field: 'peak_rate', title: '2020–2022: annualized burden' }, + 'recent': { field: 'recent_rate', title: '2023–2025: annualized burden' }, + 'transitions': { field: 'transition', title: '2020–2022 → 2023–2025' }, +}; + +async function loadJSON(path) { + const response = await fetch(path); + if (!response.ok) throw new Error(`Could not load ${path} (HTTP ${response.status}).`); + return response.json(); +} + +function formatNumber(value, digits = 0) { + return Number.isFinite(value) + ? value.toLocaleString('en-US', { maximumFractionDigits: digits }) + : 'Unavailable'; +} + +function tractDetails(feature) { + const p = feature.properties; + const content = document.createElement('div'); + const lines = [ + `Tract ${p.tract_name} (${p.tract_geoid})`, + `2020–2022: ${formatNumber(p.peak_count)} events; rate ${formatNumber(p.peak_rate, 2)}`, + `2023–2025: ${formatNumber(p.recent_count)} events; rate ${formatNumber(p.recent_rate, 2)}`, + 'Rates: annualized events per 10,000 resident population.', + `Fixed population: ${formatNumber(p.fixed_population)}`, + p.transition, + ]; + if (p.low_population_flag) lines.push('Caution: fewer than 100 residents.'); + if (p.low_count_flag) lines.push('Caution: low event count in at least one period.'); + if (p.zero_population_flag || p.missing_denominator_flag) { + lines.push('Rate unavailable because population is zero or missing. Counts are retained.'); + } + for (const line of lines) { + const paragraph = document.createElement('p'); + paragraph.textContent = line; + content.append(paragraph); + } + return content; +} + +function updateLegend(slideId) { + const view = views[slideId]; + legend.replaceChildren(); + const heading = document.createElement('strong'); + heading.textContent = view.title; + legend.append(heading); + const description = document.createElement('p'); + description.textContent = view.field === 'transition' + ? 'Fixed baseline benchmark; not statistical hotspots.' + : 'Annualized events per 10,000 residents. Same bins in both periods.'; + legend.append(description); + const entries = view.field === 'transition' + ? Object.entries(transitionColors).map(([label, color]) => ({ label, color })) + : [...rateBins, { label: 'Unavailable', color: unavailableColor }]; + const list = document.createElement('ul'); + for (const entry of entries) { + const item = document.createElement('li'); + const swatch = document.createElement('span'); + swatch.className = 'legend-swatch'; + swatch.style.backgroundColor = entry.color; + swatch.setAttribute('aria-hidden', 'true'); + item.append(swatch, document.createTextNode(entry.label)); + list.append(item); + } + legend.append(list); +} + +function populateTable(collection) { + const body = document.querySelector('#tract-table-body'); + const fragment = document.createDocumentFragment(); + for (const feature of collection.features) { + const p = feature.properties; + const row = document.createElement('tr'); + const values = [p.tract_geoid, formatNumber(p.peak_count), formatNumber(p.peak_rate, 2), + formatNumber(p.recent_count), formatNumber(p.recent_rate, 2), p.transition]; + for (const value of values) { + const cell = document.createElement('td'); + cell.textContent = value; + row.append(cell); + } + fragment.append(row); + } + body.append(fragment); +} + +async function initialize() { + try { + // both requests finish before the scroll listener is attached + const [collection, metadata] = await Promise.all([ + loadJSON('data/project1_tracts.geojson'), + loadJSON('data/metadata.json'), + ]); + if (collection.type !== 'FeatureCollection' || !collection.features?.length) { + throw new Error('The tract export is empty or is not a GeoJSON FeatureCollection.'); + } + const required = ['tract_geoid', 'tract_name', 'peak_count', 'peak_rate', + 'recent_count', 'recent_rate', 'transition', 'fixed_population']; + const seen = new Set(); + for (const feature of collection.features) { + const p = feature.properties; + if (!['Polygon', 'MultiPolygon'].includes(feature.geometry?.type) + || !p || required.some((key) => !Object.hasOwn(p, key)) + || seen.has(p.tract_geoid) || !Object.hasOwn(transitionColors, p.transition)) { + throw new Error('The tract export has invalid geometry types, fields, IDs, or categories.'); + } + seen.add(p.tract_geoid); + } + if (!Number.isFinite(metadata.benchmark_rate_10k) || metadata.baseline_percentile !== 0.75) { + throw new Error('The metadata does not describe the expected baseline benchmark.'); + } + // narrative placeholders are optional; removing one must not prevent the map loading + const benchmark = document.querySelector('#benchmark'); + if (benchmark) benchmark.textContent = formatNumber(metadata.benchmark_rate_10k, 2); + document.querySelector('#extraction-date').textContent = metadata.data_extraction_date; + document.querySelector('#transition-counts').textContent = Object.keys(transitionColors) + .map((label) => `${label}: ${collection.features.filter((f) => f.properties.transition === label).length}`) + .join('; ') + '.'; + populateTable(collection); + if (!window.L) throw new Error('Leaflet did not load. The table is available; check your internet connection and reload.'); + + // a neutral background needs no tile account and keeps this lesson focused on our data + const map = L.map('map', { scrollWheelZoom: false, zoomSnap: 0.25 }); + map.attributionControl.addAttribution('Philadelphia shooting data · US Census Bureau'); + const slideOptions = {}; + for (const [id, view] of Object.entries(views)) { + slideOptions[id] = { + style: (feature) => tractStyle(feature.properties, view.field), + onEachFeature: (feature, layer) => layer.bindPopup(tractDetails(feature)), + }; + } + updateLegend(slides[0].id); + const deck = new SlideDeck(slides, map, collection, slideOptions, updateLegend); + document.addEventListener('scroll', () => deck.calcCurrentSlideIndex(), { passive: true }); + window.addEventListener('resize', () => { + deck.fitMap(); + deck.calcCurrentSlideIndex(); + }); + status.textContent = `Loaded ${collection.features.length} tracts. Scroll to compare periods; click a tract for details.`; + } catch (error) { + status.textContent = `Map unavailable: ${error.message} Fix the problem and reload the page.`; + status.classList.add('error'); + console.error(error); + } +} + +initialize(); diff --git a/js/map-styles.js b/js/map-styles.js new file mode 100644 index 00000000..34a76431 --- /dev/null +++ b/js/map-styles.js @@ -0,0 +1,35 @@ +// display bins only: these do not determine elevated-burden status +const rateBins = [ + { minimum: 0, label: '0 to <5', color: '#440154' }, + { minimum: 5, label: '5 to <10', color: '#414487' }, + { minimum: 10, label: '10 to <20', color: '#2A788E' }, + { minimum: 20, label: '20 to <40', color: '#22A884' }, + { minimum: 40, label: '40 to <80', color: '#7AD151' }, + { minimum: 80, label: '80 or more', color: '#FDE725' }, +]; +const unavailableColor = '#777777'; +const transitionColors = { + 'Persistently elevated': '#7A0177', + 'Previously elevated': '#D95F02', + 'Newly elevated': '#1B9E77', + 'Consistently below': '#D9D9D9', + 'Unavailable': unavailableColor, +}; + +function rateColor(value) { + if (!Number.isFinite(value) || value < 0) return unavailableColor; + let color = rateBins[0].color; + for (const bin of rateBins) { + if (value >= bin.minimum) color = bin.color; + } + return color; +} + +function tractStyle(properties, view) { + const fillColor = view === 'transition' + ? (transitionColors[properties.transition] || unavailableColor) + : rateColor(properties[view]); + return { color: '#FFFFFF', weight: 0.6, fillOpacity: 0.9, fillColor }; +} + +export { rateBins, unavailableColor, transitionColors, rateColor, tractStyle }; diff --git a/js/slidedeck.js b/js/slidedeck.js new file mode 100644 index 00000000..ff0912ec --- /dev/null +++ b/js/slidedeck.js @@ -0,0 +1,41 @@ +// adapted from scrollytelly controller +class SlideDeck { + constructor(slides, map, collection, slideOptions, onSlideChange) { + this.slides = slides; + this.map = map; + this.slideOptions = slideOptions; + this.onSlideChange = onSlideChange; + this.currentSlideIndex = -1; + this.dataLayer = L.geoJSON(collection, slideOptions[slides[0].id]).addTo(map); + this.bounds = this.dataLayer.getBounds(); + if (!this.bounds.isValid()) throw new Error('The tract layer has no valid bounds.'); + this.fitMap(); + this.calcCurrentSlideIndex(); + } + + fitMap() { + this.map.invalidateSize(); + this.map.fitBounds(this.bounds, { padding: [16, 16], animate: false }); + } + + syncMapToCurrentSlide() { + const slide = this.slides[this.currentSlideIndex]; + // geometry stays fixed; only the displayed property and legend change + this.dataLayer.setStyle(this.slideOptions[slide.id].style); + this.onSlideChange(slide.id); + } + + calcCurrentSlideIndex() { + const threshold = window.innerHeight * 0.65; + let nextIndex = 0; + for (let i = 0; i < this.slides.length; i++) { + if (this.slides[i].getBoundingClientRect().top <= threshold) nextIndex = i; + } + if (nextIndex !== this.currentSlideIndex) { + this.currentSlideIndex = nextIndex; + this.syncMapToCurrentSlide(); + } + } +} + +export { SlideDeck }; diff --git a/package.json b/package.json index 5d9f6a3c..332a5ab7 100644 --- a/package.json +++ b/package.json @@ -8,7 +8,10 @@ "example": "examples" }, "scripts": { - "test": "echo \"Error: no test specified\" && exit 1" + "lint": "npm run lint:js && npm run lint:css", + "lint:js": "eslint js tests", + "lint:css": "stylelint \"css/**/*.css\"", + "test": "node --test tests/*.test.js" }, "author": "", "license": "ISC", From d754dad44d88eb2f3c433c7ec1b5487116d67762 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Wed, 16 Sep 2026 19:47:58 -0400 Subject: [PATCH 02/14] Update project1_tracts.geojson reprocessed data excluding park and special use tracts in R --- data/project1_tracts.geojson | 816 +++++++++++++++++------------------ 1 file changed, 408 insertions(+), 408 deletions(-) diff --git a/data/project1_tracts.geojson b/data/project1_tracts.geojson index 744fc41d..1de18592 100644 --- a/data/project1_tracts.geojson +++ b/data/project1_tracts.geojson @@ -3,413 +3,413 @@ "name": "project1_tracts", "crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } }, "features": [ -{ "type": "Feature", "properties": { "tract_geoid": "42101000101", "tract_name": "1.01", "fixed_population": 1963.0, "peak_count": 3, "peak_rate": 5.0942435048395316, "recent_count": 2, "recent_rate": 3.3961623365596876, "absolute_rate_change": -1.698081168279844, "absolute_count_change": -1, "benchmark_rate_10k": 13.597203178615208, "baseline_percentile": 0.75, "peak_elevated": false, "recent_elevated": false, "transition": "Consistently below", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": false, "missing_denominator_flag": false }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.152337, 39.949421 ], [ -75.151539, 39.952948 ], [ -75.141469, 39.951698 ], [ -75.141766, 39.949884 ], [ -75.142466, 39.948174 ], [ -75.152337, 39.949421 ] ] ] } }, -{ "type": "Feature", "properties": { "tract_geoid": "42101000102", "tract_name": "1.02", "fixed_population": 3172.0, "peak_count": 0, "peak_rate": 0.0, "recent_count": 1, "recent_rate": 1.0508617065994115, "absolute_rate_change": 1.0508617065994115, "absolute_count_change": 1, "benchmark_rate_10k": 13.597203178615208, "baseline_percentile": 0.75, "peak_elevated": false, "recent_elevated": false, "transition": "Consistently below", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": false, "missing_denominator_flag": false }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.151125, 39.954848 ], [ -75.151223, 39.956862 ], [ -75.150881, 39.957421 ], [ -75.148877, 39.957664 ], [ -75.148539, 39.957637 ], [ -75.144255, 39.956784 ], [ -75.142177, 39.956184 ], [ -75.141586, 39.955754 ], [ -75.141469, 39.951698 ], [ -75.151539, 39.952948 ], [ -75.151125, 39.954848 ] ] ] } }, -{ "type": "Feature", "properties": { "tract_geoid": "42101000200", "tract_name": "2", "fixed_population": 3103.0, "peak_count": 8, "peak_rate": 8.5938339241594157, "recent_count": 3, "recent_rate": 3.2226877215597813, "absolute_rate_change": -5.3711462025996344, "absolute_count_change": -5, "benchmark_rate_10k": 13.597203178615208, "baseline_percentile": 0.75, "peak_elevated": false, "recent_elevated": false, "transition": "Consistently below", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": false, "missing_denominator_flag": false }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.163093, 39.9544 ], [ -75.162339, 39.957825 ], [ -75.155538, 39.956923 ], [ -75.153846, 39.956784 ], [ -75.152893, 39.956884 ], [ -75.150881, 39.957421 ], [ -75.151223, 39.956862 ], [ -75.151125, 39.954848 ], [ -75.151539, 39.952948 ], [ -75.163093, 39.9544 ] ] ] } }, -{ "type": "Feature", "properties": { "tract_geoid": "42101000300", "tract_name": "3", "fixed_population": 4727.0, "peak_count": 1, "peak_rate": 0.70516888794866373, "recent_count": 1, "recent_rate": 0.70516888794866373, "absolute_rate_change": 0.0, "absolute_count_change": 0, "benchmark_rate_10k": 13.597203178615208, "baseline_percentile": 0.75, "peak_elevated": false, "recent_elevated": false, "transition": "Consistently below", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": false, "missing_denominator_flag": false }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.179937, 39.960028 ], [ -75.162339, 39.957825 ], [ -75.163093, 39.9544 ], [ -75.177377, 39.956176 ], [ -75.177527, 39.95549 ], [ -75.17972, 39.956164 ], [ -75.179126, 39.958004 ], [ -75.179937, 39.960028 ] ] ] } }, -{ "type": "Feature", "properties": { "tract_geoid": "42101000401", "tract_name": "4.01", "fixed_population": 2919.0, "peak_count": 0, "peak_rate": 0.0, "recent_count": 1, "recent_rate": 1.1419435879867534, "absolute_rate_change": 1.1419435879867534, "absolute_count_change": 1, "benchmark_rate_10k": 13.597203178615208, "baseline_percentile": 0.75, "peak_elevated": false, "recent_elevated": false, "transition": "Consistently below", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": false, "missing_denominator_flag": false }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.180223, 39.954472 ], [ -75.17972, 39.956164 ], [ -75.177527, 39.95549 ], [ -75.177377, 39.956176 ], [ 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13.522789723549808, "baseline_percentile": 0.75, "peak_elevated": null, "recent_elevated": null, "transition": "Unavailable", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": true, "missing_denominator_flag": false, "special_use_flag": true, "rate_exclusion_reason": "Special-use tract: residential denominator unsuitable" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.211762, 39.897747 ], [ -75.193987, 39.905633 ], [ -75.193465, 39.903433 ], [ -75.193652, 39.902387 ], [ -75.194539, 39.902499 ], [ -75.196923, 39.900884 ], [ -75.195421, 39.89903 ], [ -75.196239, 39.893365 ], [ -75.195514, 39.89184 ], [ -75.19726, 39.892618 ], [ -75.208124, 39.895675 ], [ -75.211762, 39.897747 ] ] ] } }, +{ "type": "Feature", "properties": { "tract_geoid": "42101980906", "tract_name": "9809.06", "fixed_population": 0.0, "peak_count": 2, "peak_rate": null, "recent_count": 0, "recent_rate": null, "absolute_rate_change": null, "absolute_count_change": -2, "benchmark_rate_10k": 13.522789723549808, "baseline_percentile": 0.75, "peak_elevated": null, "recent_elevated": null, "transition": "Unavailable", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": true, "missing_denominator_flag": false, "special_use_flag": true, "rate_exclusion_reason": "Special-use tract: residential denominator unsuitable" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.216123, 39.909637 ], [ -75.213906, 39.911072 ], [ -75.206841, 39.911186 ], [ -75.2055, 39.91304 ], [ -75.20209, 39.918555 ], [ -75.2017, 39.919834 ], [ -75.195045, 39.921011 ], [ -75.192494, 39.921266 ], [ -75.189653, 39.921807 ], [ -75.18943, 39.920822 ], [ -75.190298, 39.91644 ], [ -75.19022, 39.915884 ], [ -75.192285, 39.906428 ], [ -75.211762, 39.897747 ], [ -75.214927, 39.901616 ], [ -75.216123, 39.909637 ] ] ] } }, +{ "type": "Feature", "properties": { "tract_geoid": "42101989100", "tract_name": "9891", "fixed_population": 1190.0, "peak_count": 1, "peak_rate": null, "recent_count": 1, "recent_rate": null, "absolute_rate_change": null, "absolute_count_change": 0, "benchmark_rate_10k": 13.522789723549808, "baseline_percentile": 0.75, "peak_elevated": null, "recent_elevated": null, "transition": "Unavailable", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": false, "missing_denominator_flag": false, "special_use_flag": true, "rate_exclusion_reason": "Special-use tract: residential denominator unsuitable" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.017973, 40.033361 ], [ -75.018617, 40.033655 ], [ -75.021725, 40.033923 ], [ -75.021906, 40.03451 ], [ -75.021806, 40.037024 ], [ -75.016212, 40.039914 ], [ -75.01432, 40.039451 ], [ -75.012541, 40.038027 ], [ -75.011038, 40.038599 ], [ -75.006278, 40.041155 ], [ -74.99627, 40.047202 ], [ -74.990976, 40.042526 ], [ -74.986592120061601, 40.038975530568685 ], [ -74.988884, 40.037289 ], [ -75.008568, 40.023883 ], [ -75.012214, 40.020698 ], [ -75.013805034048502, 40.0202136884648 ], [ -75.015583, 40.023134 ], [ -75.022508, 40.030832 ], [ -75.017973, 40.033361 ] ] ] } }, +{ "type": "Feature", "properties": { "tract_geoid": "42101989200", "tract_name": "9892", "fixed_population": 0.0, "peak_count": 1, "peak_rate": null, "recent_count": 0, "recent_rate": null, "absolute_rate_change": null, "absolute_count_change": -1, "benchmark_rate_10k": 13.522789723549808, "baseline_percentile": 0.75, "peak_elevated": null, "recent_elevated": null, "transition": "Unavailable", "low_population_flag": false, "low_count_flag": true, "zero_population_flag": true, "missing_denominator_flag": false, "special_use_flag": true, "rate_exclusion_reason": "Special-use tract: residential denominator unsuitable" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.196923, 39.900884 ], [ -75.194539, 39.902499 ], [ -75.193652, 39.902387 ], [ -75.193809, 39.90002 ], [ -75.19194, 39.896089 ], [ -75.189553, 39.896694 ], [ -75.185189, 39.897048 ], [ -75.176903, 39.898652 ], [ -75.174959, 39.898488 ], [ -75.170726, 39.897583 ], [ -75.15468, 39.897064 ], [ -75.144277, 39.895682 ], [ -75.141533, 39.895062 ], [ -75.135413798820693, 39.892999568309399 ], [ -75.137296, 39.889966 ], [ -75.141522, 39.886891 ], [ -75.143746, 39.884998 ], [ -75.148893, 39.883727 ], [ -75.183023, 39.882013 ], [ -75.189323, 39.880713 ], [ -75.195217294768597, 39.877343945193196 ], [ -75.195514, 39.89184 ], [ -75.196239, 39.893365 ], [ -75.195421, 39.89903 ], [ -75.196923, 39.900884 ] ] ] } }, +{ "type": "Feature", "properties": { "tract_geoid": "42101989300", "tract_name": "9893", "fixed_population": 453.0, "peak_count": 13, "peak_rate": null, "recent_count": 11, "recent_rate": null, "absolute_rate_change": null, "absolute_count_change": -2, "benchmark_rate_10k": 13.522789723549808, "baseline_percentile": 0.75, "peak_elevated": null, "recent_elevated": null, "transition": "Unavailable", "low_population_flag": false, "low_count_flag": false, "zero_population_flag": false, "missing_denominator_flag": false, "special_use_flag": true, "rate_exclusion_reason": "Special-use tract: residential denominator unsuitable" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -75.131937, 40.005156 ], [ -75.128883, 40.018945 ], [ -75.125023, 40.018435 ], [ -75.125092, 40.018105 ], [ -75.124556, 40.017826 ], [ -75.122752, 40.019722 ], [ -75.11751, 40.019054 ], [ -75.117475, 40.015783 ], [ -75.119439, 40.013026 ], [ -75.112161, 40.012085 ], [ -75.114161, 40.002811 ], [ -75.11609, 40.003067 ], [ -75.11629, 40.002141 ], [ -75.11902, 40.001961 ], [ -75.12441, 40.002634 ], [ -75.123949, 40.004814 ], [ -75.127863, 40.005057 ], [ -75.131937, 40.005156 ] ] ] } } ] } From 722b3083ab20402ecb9fdabcf922bdbe6d0cd665 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Wed, 16 Sep 2026 19:49:10 -0400 Subject: [PATCH 03/14] narrative and aesthetic changes --- css/index.css | 6 +++++- data/metadata.json | 13 ++++++++++--- js/index.js | 28 ++++++++++++++++++---------- js/map-styles.js | 5 +++-- 4 files changed, 36 insertions(+), 16 deletions(-) diff --git a/css/index.css b/css/index.css index 3ec9f8d1..33221fa5 100644 --- a/css/index.css +++ b/css/index.css @@ -4,7 +4,7 @@ body { box-sizing: border-box; height: 100vh; - font-family: 'Source Sans Pro', sans-serif; + font-family: 'IBM Plex Sans', sans-serif; } .map-container { @@ -20,6 +20,10 @@ body { background: #f2f2ef; } +.context-tiles { + filter: grayscale(1); +} + .slide-section { position: relative; margin-top: -90vh; diff --git a/data/metadata.json b/data/metadata.json index f21954e2..c2319236 100644 --- a/data/metadata.json +++ b/data/metadata.json @@ -17,8 +17,15 @@ "acs_vintage_and_variable": "2020-2024 ACS 5-year B01003_001 total population estimate and margin of error", "rate_definition": "period_count / (fixed total population * years in period) * 10000; area-level place-based burden, not resident incidence", "primary_method": "Fixed 2015-2019 upper-quartile tract annualized burden benchmark", + "rate_eligibility": { + "rule": "Exclude Census special-use tract codes 9800-9899 from all rates and classifications, including constituent block groups; retain geometry and raw counts", + "source": "https://www2.census.gov/geo/pdfs/partnerships/psap/G-650.pdf", + "excluded_tract_geoids": ["42101980001", "42101980002", "42101980003", "42101980100", "42101980200", "42101980300", "42101980400", "42101980500", "42101980600", "42101980701", "42101980702", "42101980800", "42101980901", "42101980902", "42101980903", "42101980904", "42101980905", "42101980906", "42101989100", "42101989200", "42101989300"], + "display": "Unavailable; rate_exclusion_reason distinguishes special-use exclusions from missing/zero population", + "revision": "Land-use eligibility revision after map review; all periods and the baseline benchmark recalculated" + }, "baseline_percentile": 0.75, - "benchmark_rate_10k": 13.5972031786152, + "benchmark_rate_10k": 13.5227897235498, "quantile_type": 7, "threshold_inclusion": "greater than or equal to unrounded cutoff; zero-event positive-population tracts included", "threshold_comparison_periods": "same cutoff for 2020-2022 and 2023-2025; not recalculated within each period", @@ -34,10 +41,10 @@ "previously": "Previously elevated: at or above the benchmark only in 2020-2022", "newly": "Newly elevated: at or above the benchmark only in 2023-2025", "below": "Consistently below: below the benchmark in both periods", - "unavailable": "classification cannot be calculated because of denominator or geometry problems" + "unavailable": "classification unavailable for special-use tracts or denominator/geometry problems" }, "planned_social_measures": ["ACS economic, housing, education, age, and racial/ethnic composition", "CDC/ATSDR SVI overall and theme-specific measures, with explicit vintage and ranking reference"], "known_limitations": ["75th percentile is a descriptive baseline reference, not a clinical or significance threshold", "classification ignores uncertainty around rates and ACS population; low-count and denominator flags retained", "descriptive spatial epidemiology; no causal or predictive interpretation", "event location may differ from victim residence", "a fixed ACS denominator does not capture all population change during 2015-2025", "local statistics depend on geography, spatial weights, sparse counts, and multiple-testing decisions", "below benchmark is not evidence that shooting violence is absent", "source completeness checks cannot detect every reporting delay or omission"], "source_filenames": ["data/raw/shootings_2272_2026-05-21.gpkg", "tract_2020_acs2024_population.gpkg", "block_group_2020_acs2024_population.gpkg"], - "generation_timestamp": "2026-09-14 05:01:39 UTC" + "generation_timestamp": "2026-09-16 20:19:51 UTC" } diff --git a/js/index.js b/js/index.js index 3c1f09cd..97e6e8c2 100644 --- a/js/index.js +++ b/js/index.js @@ -1,12 +1,12 @@ import { SlideDeck } from './slidedeck.js'; -import { rateBins, unavailableColor, transitionColors, tractStyle } from './map-styles.js'; +import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpacity } from './map-styles.js'; const status = document.querySelector('#load-status'); const legend = document.querySelector('#map-legend'); const slides = document.querySelectorAll('.slide'); const views = { - 'peak': { field: 'peak_rate', title: '2020–2022: annualized burden' }, - 'recent': { field: 'recent_rate', title: '2023–2025: annualized burden' }, + 'peak': { field: 'peak_rate', title: '2020–2022: peak period' }, + 'recent': { field: 'recent_rate', title: '2023–2025: recent decline' }, 'transitions': { field: 'transition', title: '2020–2022 → 2023–2025' }, }; @@ -27,14 +27,15 @@ function tractDetails(feature) { const content = document.createElement('div'); const lines = [ `Tract ${p.tract_name} (${p.tract_geoid})`, - `2020–2022: ${formatNumber(p.peak_count)} events; rate ${formatNumber(p.peak_rate, 2)}`, - `2023–2025: ${formatNumber(p.recent_count)} events; rate ${formatNumber(p.recent_rate, 2)}`, - 'Rates: annualized events per 10,000 resident population.', + `2020–2022: ${formatNumber(p.peak_count)} shootings; rate ${formatNumber(p.peak_rate, 2)}`, + `2023–2025: ${formatNumber(p.recent_count)} shootings; rate ${formatNumber(p.recent_rate, 2)}`, + 'Rates: firearm injury rates per 10,000 resident population per year', `Fixed population: ${formatNumber(p.fixed_population)}`, p.transition, ]; if (p.low_population_flag) lines.push('Caution: fewer than 100 residents.'); if (p.low_count_flag) lines.push('Caution: low event count in at least one period.'); + if (p.rate_exclusion_reason) lines.push(`Rate unavailable: ${p.rate_exclusion_reason}. Counts are retained.`); if (p.zero_population_flag || p.missing_denominator_flag) { lines.push('Rate unavailable because population is zero or missing. Counts are retained.'); } @@ -54,8 +55,8 @@ function updateLegend(slideId) { legend.append(heading); const description = document.createElement('p'); description.textContent = view.field === 'transition' - ? 'Fixed baseline benchmark; not statistical hotspots.' - : 'Annualized events per 10,000 residents. Same bins in both periods.'; + ? 'Baseline set at 75th percentile of 2015–2019 tract rates.' + : 'Firearm injury rates per 10,000 residents per year. Unavailable includes special-use tracts.'; legend.append(description); const entries = view.field === 'transition' ? Object.entries(transitionColors).map(([label, color]) => ({ label, color })) @@ -66,6 +67,7 @@ function updateLegend(slideId) { const swatch = document.createElement('span'); swatch.className = 'legend-swatch'; swatch.style.backgroundColor = entry.color; + swatch.style.opacity = tractFillOpacity; swatch.setAttribute('aria-hidden', 'true'); item.append(swatch, document.createTextNode(entry.label)); list.append(item); @@ -126,8 +128,14 @@ async function initialize() { populateTable(collection); if (!window.L) throw new Error('Leaflet did not load. The table is available; check your internet connection and reload.'); - // a neutral background needs no tile account and keeps this lesson focused on our data + // context tiles sit beneath the tract polygons; classification stays in the R exports const map = L.map('map', { scrollWheelZoom: false, zoomSnap: 0.25 }); + L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', { + attribution: '© OpenStreetMap contributors', + maxZoom: 19, + className: 'context-tiles', + opacity: 0.8, + }).addTo(map); map.attributionControl.addAttribution('Philadelphia shooting data · US Census Bureau'); const slideOptions = {}; for (const [id, view] of Object.entries(views)) { @@ -143,7 +151,7 @@ async function initialize() { deck.fitMap(); deck.calcCurrentSlideIndex(); }); - status.textContent = `Loaded ${collection.features.length} tracts. Scroll to compare periods; click a tract for details.`; + status.textContent = `Loaded ${collection.features.length} tracts. Click a tract to see details.`; } catch (error) { status.textContent = `Map unavailable: ${error.message} Fix the problem and reload the page.`; status.classList.add('error'); diff --git a/js/map-styles.js b/js/map-styles.js index 34a76431..86523957 100644 --- a/js/map-styles.js +++ b/js/map-styles.js @@ -8,6 +8,7 @@ const rateBins = [ { minimum: 80, label: '80 or more', color: '#FDE725' }, ]; const unavailableColor = '#777777'; +const tractFillOpacity = 0.75; const transitionColors = { 'Persistently elevated': '#7A0177', 'Previously elevated': '#D95F02', @@ -29,7 +30,7 @@ function tractStyle(properties, view) { const fillColor = view === 'transition' ? (transitionColors[properties.transition] || unavailableColor) : rateColor(properties[view]); - return { color: '#FFFFFF', weight: 0.6, fillOpacity: 0.9, fillColor }; + return { color: '#FFFFFF', weight: 0.6, fillOpacity: tractFillOpacity, fillColor }; } -export { rateBins, unavailableColor, transitionColors, rateColor, tractStyle }; +export { rateBins, unavailableColor, transitionColors, rateColor, tractStyle, tractFillOpacity }; From a0604dad53dc1276d881ddab3db42feddeab605c Mon Sep 17 00:00:00 2001 From: frogzorz Date: Wed, 16 Sep 2026 20:05:06 -0400 Subject: [PATCH 04/14] Update index.html --- index.html | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/index.html b/index.html index a2ec55ad..dbe07ff4 100644 --- a/index.html +++ b/index.html @@ -8,7 +8,7 @@ - + @@ -27,7 +27,7 @@

Philadelphia shooting violence: decline and persistent burden

Loading export…

2020–2022: peak period

-

Colors show shooting events per 10,000 resident population per year.

+

Colors show firearm injury rates per 10,000 resident population per year.

Scroll to compare the next period using the same color bins. Gray = rate is unavailable, not that no shootings occurred.

@@ -40,7 +40,7 @@

2023–2025: the recent decline

Where elevated burden persisted

-

We classified each tract against one historical benchmark: the 75th percentile of 2015–2019 tract rates, approximately 13.60 events per 10,000 population per year

+

We classified each tract against one historical benchmark: the 75th percentile of 2015–2019 tract rates, approximately 13.52 events per 10,000 population per year

Transition counts will appear after the data load.

“Previously elevated” means below this benchmark in the recent period, not that violence disappeared. With a fixed benchmark and widespread declines, we do not expect many newly elevated tracts

tktktk - warn against causal inference, this is purely descriptive

From 7fe4ab945a82eba3ac446edbd87a9f68cbc89822 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Fri, 18 Sep 2026 00:08:01 -0400 Subject: [PATCH 05/14] added line graph, cleaned narrative imported line graph as intro, made some narrative edits --- css/index.css | 85 ++++++++++++++++++++++++++++++++++++++++++++++++ index.html | 49 ++++++++++++++++++++++------ js/city-chart.js | 61 ++++++++++++++++++++++++++++++++++ js/index.js | 61 ++++++++++++++++++++++++++-------- js/map-styles.js | 24 +++++++++----- js/slidedeck.js | 22 ++----------- 6 files changed, 251 insertions(+), 51 deletions(-) create mode 100644 js/city-chart.js diff --git a/css/index.css b/css/index.css index 33221fa5..9a8a27a7 100644 --- a/css/index.css +++ b/css/index.css @@ -7,6 +7,64 @@ body { font-family: 'IBM Plex Sans', sans-serif; } +[hidden] { + display: none !important; +} + +.story-intro { + max-width: 60rem; + margin: 0 auto; + padding: 3rem 1.5rem; + line-height: 1.55; +} + +.map-panel { + height: 100%; +} + +.chart-panel { + height: 100%; + box-sizing: border-box; + display: flex; + flex-direction: column; + justify-content: center; + padding: 1.25rem; + background: white; + overflow: auto; +} + +.chart-panel h2 { + font-size: 1.2rem; +} + +.chart-panel p { + font-size: 0.8rem; +} + +#city-chart svg { + display: block; + width: 100%; + max-height: 65vh; + font-family: inherit; + font-size: 15px; +} + +.draft-prompt { + color: #555; + font-style: italic; +} + +.tile-status { + position: absolute; + top: 0; + left: 3rem; + right: 0.5rem; + z-index: 500; + background: white; + padding: 0.4rem; + font-size: 0.8rem; +} + .map-container { position: sticky; top: 0; @@ -179,6 +237,33 @@ td { } @media (width <= 800px) { + .map-panel { + display: flex; + flex-direction: column; + min-height: 0; + } + + .chart-panel { + padding: 0.5rem; + } + + .chart-panel h2 { + font-size: 1rem; + margin: 0.3rem 0; + } + + .chart-panel p { + margin: 0.25rem 0; + } + + #city-chart svg { + font-size: 18px; + } + + .chart-year:nth-of-type(even) { + visibility: hidden; + } + .map-container { width: 100%; height: 52vh; diff --git a/index.html b/index.html index dbe07ff4..375144c4 100644 --- a/index.html +++ b/index.html @@ -4,7 +4,7 @@ - Philadelphia shooting violence — first data preview + Firearm violence across space and time in Philadelphia, PA, 2015-2025 — first data preview @@ -12,20 +12,49 @@ - +
+
+

Project 1 preview

+

Firearm violence across space and time in Philadelphia, PA, 2015-2025

+

more narrative TK

+ + +

Loading exports…

+ +
-
- +
+

Philadelphia firearm injuries, 2015–2025

+
+

Annual counts, fatal and nonfatal combined; officer-involved shootings excluded. Source: Philadelphia Police Department via OpenDataPhilly.

+
+
+
+

The citywide trend

+

Prior to the COVID-19 pandemic, firearm injuries in Philadelphia already represented a grave public health concern, with efforts to curb violence only met by steadily increasing shooting rates. Then, they surged in the wake of the 2020 lockdown, and dropped dramatically after 2022.

+
+ View annual injury counts +
+ + + + +
Citywide injuries, with officer-involved shootings excluded
YearTotalFatalNonfatal
+
+
+
+
+

From citywide counts to tract rates

+

However, the decline was not uniform across all areas. This leads to the question of where the burden of firearm injuries persisted despite overall decreases. In the following maps, we will use firearm injury rates per 10,000 resident population to compare disparities across the city.

+
-

Project 1 preview

-

Philadelphia shooting violence: decline and persistent burden

-

more narrative TK

- -

Loading export…

-

2020–2022: peak period

Colors show firearm injury rates per 10,000 resident population per year.

Scroll to compare the next period using the same color bins. Gray = rate is unavailable, not that no shootings occurred.

diff --git a/js/city-chart.js b/js/city-chart.js new file mode 100644 index 00000000..78a313be --- /dev/null +++ b/js/city-chart.js @@ -0,0 +1,61 @@ +// chart coordinates are presentation only; all counts come from R +function chartLayout(rows) { + if (!Array.isArray(rows) || rows.length !== 11 + || rows.some((row, i) => row.year !== 2015 + i + || !Number.isInteger(row.total) || row.total < 0)) { + throw new Error('City data must contain annual victim counts for 2015–2025.'); + } + const maximum = Math.max(500, Math.ceil(Math.max(...rows.map((r) => r.total)) / 500) * 500); + const x = (year) => 65 + (year - 2014.5) / 11 * 600; + const y = (total) => 310 - total / maximum * 240; + return { maximum, x, y, points: rows.map((row) => ({ ...row, x: x(row.year), y: y(row.total) })) }; +} + +function svgElement(tag, attributes, text) { + const element = document.createElementNS('http://www.w3.org/2000/svg', tag); + for (const [key, value] of Object.entries(attributes)) element.setAttribute(key, value); + if (text !== undefined) element.textContent = text; + return element; +} + +function renderCityChart(container, rows) { + const { maximum, x, y, points } = chartLayout(rows); + const svg = svgElement('svg', { 'viewBox': '0 0 700 370', 'role': 'img', 'aria-labelledby': 'city-chart-title city-chart-description' }); + svg.append(svgElement('title', { id: 'city-chart-title' }, 'Philadelphia shooting victims, 2015–2025')); + svg.append(svgElement('desc', { id: 'city-chart-description' }, + 'Annual counts, including fatal and nonfatal victims, excluding officer-involved shootings. Exact values are in the annual-count table.')); + for (const [start, end, label, color] of [ + [2014.5, 2019.5, 'Baseline', '#E6EFF5'], + [2019.5, 2022.5, 'Peak', '#FAEBDD'], + [2022.5, 2025.5, 'Recent decline', '#E4F0E9'], + ]) { + svg.append(svgElement('rect', { x: x(start), y: 55, width: x(end) - x(start), height: 255, fill: color })); + svg.append(svgElement('text', { 'x': (x(start) + x(end)) / 2, 'y': 42, 'text-anchor': 'middle' }, label)); + } + for (let count = 0; count <= maximum; count += 500) { + svg.append(svgElement('line', { x1: 65, x2: 665, y1: y(count), y2: y(count), stroke: '#FFFFFF' })); + svg.append(svgElement('text', { 'x': 57, 'y': y(count) + 5, 'text-anchor': 'end' }, count.toLocaleString('en-US'))); + } + svg.append(svgElement('polyline', { 'points': points.map((p) => `${p.x},${p.y}`).join(' '), 'fill': 'none', 'stroke': '#145B80', 'stroke-width': 3 })); + for (const point of points) { + const circle = svgElement('circle', { cx: point.x, cy: point.y, r: 4, fill: '#145B80' }); + circle.append(svgElement('title', {}, `${point.year}: ${point.total.toLocaleString('en-US')} victims`)); + svg.append(circle); + svg.append(svgElement('text', { 'x': point.x, 'y': 334, 'text-anchor': 'middle', 'class': 'chart-year' }, point.year)); + } + container.replaceChildren(svg); + const body = document.querySelector('#city-table-body'); + body.replaceChildren(); + for (const row of rows) { + const tr = document.createElement('tr'); + for (const field of ['year', 'total', 'fatal', 'nonfatal']) { + const cell = document.createElement(field === 'year' ? 'th' : 'td'); + if (field === 'year') cell.scope = 'row'; + cell.textContent = field === 'year' ? row[field] : row[field].toLocaleString('en-US'); + tr.append(cell); + } + body.append(tr); + } +} + +export { chartLayout, renderCityChart }; diff --git a/js/index.js b/js/index.js index 97e6e8c2..1a535dd4 100644 --- a/js/index.js +++ b/js/index.js @@ -1,4 +1,5 @@ import { SlideDeck } from './slidedeck.js'; +import { renderCityChart } from './city-chart.js'; import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpacity } from './map-styles.js'; const status = document.querySelector('#load-status'); @@ -68,6 +69,7 @@ function updateLegend(slideId) { swatch.className = 'legend-swatch'; swatch.style.backgroundColor = entry.color; swatch.style.opacity = tractFillOpacity; + if (view.field !== 'transition' && entry.label === 'Unavailable') swatch.style.borderStyle = 'dashed'; swatch.setAttribute('aria-hidden', 'true'); item.append(swatch, document.createTextNode(entry.label)); list.append(item); @@ -96,9 +98,10 @@ function populateTable(collection) { async function initialize() { try { // both requests finish before the scroll listener is attached - const [collection, metadata] = await Promise.all([ + const [collection, metadata, city] = await Promise.all([ loadJSON('data/project1_tracts.geojson'), loadJSON('data/metadata.json'), + loadJSON('data/city_year.json'), ]); if (collection.type !== 'FeatureCollection' || !collection.features?.length) { throw new Error('The tract export is empty or is not a GeoJSON FeatureCollection.'); @@ -126,32 +129,64 @@ async function initialize() { .map((label) => `${label}: ${collection.features.filter((f) => f.properties.transition === label).length}`) .join('; ') + '.'; populateTable(collection); + renderCityChart(document.querySelector('#city-chart'), city); if (!window.L) throw new Error('Leaflet did not load. The table is available; check your internet connection and reload.'); // context tiles sit beneath the tract polygons; classification stays in the R exports const map = L.map('map', { scrollWheelZoom: false, zoomSnap: 0.25 }); - L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', { + const basemap = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', { attribution: '© OpenStreetMap contributors', maxZoom: 19, className: 'context-tiles', opacity: 0.8, - }).addTo(map); + }); + const tileStatus = document.querySelector('#tile-status'); + basemap.on('tileerror', () => { + tileStatus.textContent = 'Some basemap tiles could not load. Tract data and tables remain available.'; + tileStatus.hidden = false; + }); map.attributionControl.addAttribution('Philadelphia shooting data · US Census Bureau'); - const slideOptions = {}; - for (const [id, view] of Object.entries(views)) { - slideOptions[id] = { - style: (feature) => tractStyle(feature.properties, view.field), - onEachFeature: (feature, layer) => layer.bindPopup(tractDetails(feature)), - }; + const dataLayer = L.geoJSON(collection, { + style: (feature) => tractStyle(feature.properties, 'peak_rate'), + onEachFeature: (feature, layer) => layer.bindPopup(tractDetails(feature)), + }); + const bounds = dataLayer.getBounds(); + if (!bounds.isValid()) throw new Error('The tract layer has no valid bounds.'); + const chartPanel = document.querySelector('#chart-panel'); + const mapPanel = document.querySelector('#map-panel'); + function fitMap() { + map.invalidateSize(); + map.fitBounds(bounds, { padding: [16, 16], animate: false }); + } + function showStage(id) { + const isChart = id === 'citywide'; + chartPanel.hidden = !isChart; + mapPanel.hidden = isChart; + map.closePopup(); + if (isChart) return; + if (!map.hasLayer(basemap)) basemap.addTo(map); + if (id === 'orientation') { + map.removeLayer(dataLayer); + legend.replaceChildren(); + const heading = document.createElement('strong'); + heading.textContent = 'Philadelphia: geographic context'; + const description = document.createElement('p'); + // description.textContent = 'Basemap only'; + legend.append(heading, description); + } else { + dataLayer.setStyle((feature) => tractStyle(feature.properties, views[id].field)); + if (!map.hasLayer(dataLayer)) dataLayer.addTo(map); + updateLegend(id); + } + fitMap(); } - updateLegend(slides[0].id); - const deck = new SlideDeck(slides, map, collection, slideOptions, updateLegend); + const deck = new SlideDeck(slides, showStage); document.addEventListener('scroll', () => deck.calcCurrentSlideIndex(), { passive: true }); window.addEventListener('resize', () => { - deck.fitMap(); + if (!mapPanel.hidden) fitMap(); deck.calcCurrentSlideIndex(); }); - status.textContent = `Loaded ${collection.features.length} tracts. Click a tract to see details.`; + status.textContent = `Loaded ${city.length} annual counts and ${collection.features.length} tracts.`; } catch (error) { status.textContent = `Map unavailable: ${error.message} Fix the problem and reload the page.`; status.classList.add('error'); diff --git a/js/map-styles.js b/js/map-styles.js index 86523957..2b230936 100644 --- a/js/map-styles.js +++ b/js/map-styles.js @@ -1,11 +1,12 @@ -// display bins only: these do not determine elevated-burden status +// reversed rocket, range 0.50–0.95; darkest endpoint adjusted to dark red +// display colors only: bins and analytic rates are unchanged const rateBins = [ - { minimum: 0, label: '0 to <5', color: '#440154' }, - { minimum: 5, label: '5 to <10', color: '#414487' }, - { minimum: 10, label: '10 to <20', color: '#2A788E' }, - { minimum: 20, label: '20 to <40', color: '#22A884' }, - { minimum: 40, label: '40 to <80', color: '#7AD151' }, - { minimum: 80, label: '80 or more', color: '#FDE725' }, + { minimum: 0, label: '0 to <5', color: '#F8D7C1' }, + { minimum: 5, label: '5 to <10', color: '#F6B490' }, + { minimum: 10, label: '10 to <20', color: '#F58F66' }, + { minimum: 20, label: '20 to <40', color: '#F16646' }, + { minimum: 40, label: '40 to <80', color: '#E53A40' }, + { minimum: 80, label: '80 or more', color: '#9E1B32' }, ]; const unavailableColor = '#777777'; const tractFillOpacity = 0.75; @@ -30,7 +31,14 @@ function tractStyle(properties, view) { const fillColor = view === 'transition' ? (transitionColors[properties.transition] || unavailableColor) : rateColor(properties[view]); - return { color: '#FFFFFF', weight: 0.6, fillOpacity: tractFillOpacity, fillColor }; + const unavailableRate = view !== 'transition' && fillColor === unavailableColor; + return { + color: unavailableRate ? '#333333' : '#FFFFFF', + weight: unavailableRate ? 1 : 0.6, + dashArray: unavailableRate ? '3 3' : null, + fillOpacity: tractFillOpacity, + fillColor, + }; } export { rateBins, unavailableColor, transitionColors, rateColor, tractStyle, tractFillOpacity }; diff --git a/js/slidedeck.js b/js/slidedeck.js index ff0912ec..b29f42ac 100644 --- a/js/slidedeck.js +++ b/js/slidedeck.js @@ -1,30 +1,12 @@ // adapted from scrollytelly controller class SlideDeck { - constructor(slides, map, collection, slideOptions, onSlideChange) { + constructor(slides, onSlideChange) { this.slides = slides; - this.map = map; - this.slideOptions = slideOptions; this.onSlideChange = onSlideChange; this.currentSlideIndex = -1; - this.dataLayer = L.geoJSON(collection, slideOptions[slides[0].id]).addTo(map); - this.bounds = this.dataLayer.getBounds(); - if (!this.bounds.isValid()) throw new Error('The tract layer has no valid bounds.'); - this.fitMap(); this.calcCurrentSlideIndex(); } - fitMap() { - this.map.invalidateSize(); - this.map.fitBounds(this.bounds, { padding: [16, 16], animate: false }); - } - - syncMapToCurrentSlide() { - const slide = this.slides[this.currentSlideIndex]; - // geometry stays fixed; only the displayed property and legend change - this.dataLayer.setStyle(this.slideOptions[slide.id].style); - this.onSlideChange(slide.id); - } - calcCurrentSlideIndex() { const threshold = window.innerHeight * 0.65; let nextIndex = 0; @@ -33,7 +15,7 @@ class SlideDeck { } if (nextIndex !== this.currentSlideIndex) { this.currentSlideIndex = nextIndex; - this.syncMapToCurrentSlide(); + this.onSlideChange(this.slides[nextIndex].id); } } } From 45f64650e3ce2e7ef44f6c282414477d9b35edd3 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Fri, 18 Sep 2026 13:44:45 -0400 Subject: [PATCH 06/14] aesthetic changes added smooth transitions, fixed some minor aesthetic stuff --- js/index.js | 16 +++++++++++++--- js/map-styles.js | 8 ++++---- js/stage-transition.js | 37 +++++++++++++++++++++++++++++++++++++ 3 files changed, 54 insertions(+), 7 deletions(-) create mode 100644 js/stage-transition.js diff --git a/js/index.js b/js/index.js index 1a535dd4..32b78acd 100644 --- a/js/index.js +++ b/js/index.js @@ -1,5 +1,6 @@ import { SlideDeck } from './slidedeck.js'; import { renderCityChart } from './city-chart.js'; +import { createStageTransition } from './stage-transition.js'; import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpacity } from './map-styles.js'; const status = document.querySelector('#load-status'); @@ -69,7 +70,7 @@ function updateLegend(slideId) { swatch.className = 'legend-swatch'; swatch.style.backgroundColor = entry.color; swatch.style.opacity = tractFillOpacity; - if (view.field !== 'transition' && entry.label === 'Unavailable') swatch.style.borderStyle = 'dashed'; + if (entry.label === 'Unavailable') swatch.style.borderStyle = 'dashed'; swatch.setAttribute('aria-hidden', 'true'); item.append(swatch, document.createTextNode(entry.label)); list.append(item); @@ -146,7 +147,11 @@ async function initialize() { tileStatus.hidden = false; }); map.attributionControl.addAttribution('Philadelphia shooting data · US Census Bureau'); + // animate only this pane; context tiles and map controls remain steady + const tractPane = map.createPane('tracts'); + tractPane.style.zIndex = 450; const dataLayer = L.geoJSON(collection, { + pane: 'tracts', style: (feature) => tractStyle(feature.properties, 'peak_rate'), onEachFeature: (feature, layer) => layer.bindPopup(tractDetails(feature)), }); @@ -160,6 +165,7 @@ async function initialize() { } function showStage(id) { const isChart = id === 'citywide'; + const wasMapHidden = mapPanel.hidden; chartPanel.hidden = !isChart; mapPanel.hidden = isChart; map.closePopup(); @@ -178,9 +184,13 @@ async function initialize() { if (!map.hasLayer(dataLayer)) dataLayer.addTo(map); updateLegend(id); } - fitMap(); + if (wasMapHidden) fitMap(); } - const deck = new SlideDeck(slides, showStage); + const transitionToStage = createStageTransition( + tractPane, showStage, + window.matchMedia('(prefers-reduced-motion: reduce)'), + ); + const deck = new SlideDeck(slides, transitionToStage); document.addEventListener('scroll', () => deck.calcCurrentSlideIndex(), { passive: true }); window.addEventListener('resize', () => { if (!mapPanel.hidden) fitMap(); diff --git a/js/map-styles.js b/js/map-styles.js index 2b230936..477b3a8c 100644 --- a/js/map-styles.js +++ b/js/map-styles.js @@ -31,11 +31,11 @@ function tractStyle(properties, view) { const fillColor = view === 'transition' ? (transitionColors[properties.transition] || unavailableColor) : rateColor(properties[view]); - const unavailableRate = view !== 'transition' && fillColor === unavailableColor; + const unavailable = fillColor === unavailableColor; return { - color: unavailableRate ? '#333333' : '#FFFFFF', - weight: unavailableRate ? 1 : 0.6, - dashArray: unavailableRate ? '3 3' : null, + color: unavailable ? '#333333' : '#FFFFFF', + weight: unavailable ? 1 : 0.6, + dashArray: unavailable ? '3 3' : null, fillOpacity: tractFillOpacity, fillColor, }; diff --git a/js/stage-transition.js b/js/stage-transition.js new file mode 100644 index 00000000..93402e31 --- /dev/null +++ b/js/stage-transition.js @@ -0,0 +1,37 @@ +// fade between stages of presentation +export function createStageTransition(element, update, motion) { + let animation; + let revision = 0; + let initialized = false; + let latestId; + + async function show(id) { + latestId = id; + const current = ++revision; + animation?.cancel(); + if (!initialized || motion.matches || !element.animate) { + initialized = true; + update(id); + return; + } + animation = element.animate([{ opacity: 1 }, { opacity: 0 }], { + duration: 120, easing: 'ease-out', fill: 'forwards', + }); + try { + await animation.finished; + } catch { + return; // a newer scroll stage superseded this one + } + if (current !== revision) return; + update(id); + animation.cancel(); + animation = element.animate([{ opacity: 0 }, { opacity: 1 }], { + duration: 180, easing: 'ease-in', + }); + } + + motion.addEventListener('change', () => { + if (motion.matches && initialized) show(latestId); + }); + return show; +} From f2a1e19c6d0d4feef6cb992958d2f16f5f12e0f8 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Tue, 22 Sep 2026 23:45:27 -0400 Subject: [PATCH 07/14] Update index.html narrative update draft --- index.html | 42 ++++++++++++++++++++++++------------------ 1 file changed, 24 insertions(+), 18 deletions(-) diff --git a/index.html b/index.html index 375144c4..7f507923 100644 --- a/index.html +++ b/index.html @@ -4,7 +4,7 @@ - Firearm violence across space and time in Philadelphia, PA, 2015-2025 — first data preview + Firearm violence across space and time in Philadelphia, PA, 2015-2025 @@ -15,12 +15,13 @@
-

Project 1 preview

Firearm violence across space and time in Philadelphia, PA, 2015-2025

-

more narrative TK

- +

Jamie Song, MPH for MUSA 6110, Fall 2026 | Professor Mjumbe Poe

+

In the modern era, firearm violence in Philadelphia has been a persistent burden on public health and safety. In the past several years, the city experienced a sharp pandemic-era increase in firearm-related injuries, followed by a decline to historically low rates, a trend that continues through the present day (2026).

+

What remain unclear are how this citywide trend has manifested across different parts of the city, and whether some benefited more from the decline. In this storymap project, we pose the question: how evenly has firearm injury burden declined across the census tracts of Philadelphia?

+

To navigate this site, scroll through the sections below to see how firearm injury rates have changed across space and time in Philadelphia.

-

Loading exports…

+

Loading exports…

@@ -38,12 +39,13 @@

Philadelphia firearm injuries, 2015–2025

The citywide trend

-

Prior to the COVID-19 pandemic, firearm injuries in Philadelphia already represented a grave public health concern, with efforts to curb violence only met by steadily increasing shooting rates. Then, they surged in the wake of the 2020 lockdown, and dropped dramatically after 2022.

+

Prior to the COVID-19 pandemic, firearm injuries in Philadelphia already represented a grave public health concern, with efforts to curb violence only met by steadily increasing shooting rates. Then, they surged in the wake of the 2020 lockdown, and dropped dramatically after 2022. In 2026, the city is on track to maintain its downward trend, reaching lows not seen since before firearm violence became a widespread public health issue.

+

Note: Counts include both fatal and nonfatal injuries.

- View annual injury counts + View table of annual injury counts
- +
Citywide injuries, with officer-involved shootings excludedCitywide firearm injuries
YearTotalFatalNonfatal
@@ -52,30 +54,34 @@

The citywide trend

From citywide counts to tract rates

-

However, the decline was not uniform across all areas. This leads to the question of where the burden of firearm injuries persisted despite overall decreases. In the following maps, we will use firearm injury rates per 10,000 resident population to compare disparities across the city.

+

However, only looking at citywide trends can hide variation between different parts of the city. Some areas may have benefited more from the decline than others.

+

In the following maps, we will use firearm injury rates per 10,000 resident population, rather than raw counts, to compare disparities across the city. We will use Census tracts to represent these areas; however, please note that tracts are areas developed and used for US Census purposes, and they are not intended to represent neighborhoods.

+

Please also note that, like generalizing citywide trends to smaller parts of the city, tract-level firearm injury burden is not the same as a tract resident's individual risk.

2020–2022: peak period

-

Colors show firearm injury rates per 10,000 resident population per year.

-

Scroll to compare the next period using the same color bins. Gray = rate is unavailable, not that no shootings occurred.

+

This map shows how firearm violence varied across the city during the post-pandemic years. Darker colors show higher annual firearm rates. Injury burden is most concentrated in areas of North Philadelphia, particularly in Kensington and along the Amtrak corridor, as well as West and Southwest Philadelphia.

+

Gray tracts indicate that the rate is unavailable, not that no shootings occurred. Certain tracts, such as parks, are excluded because their small populations make their rates unreliable.

+

Scroll down to compare the next period using the same color bins.

2023–2025: the recent decline

-

The map now displays recent-period rates

-

Note: both periods use a fixed 2020–2024 ACS population denominator, which is good for comparability but doesn't capture population change over time

-

The legend ranges are not thresholds of elevated burden

+

This map displays rates from more recent years. We can see that the colors across tracts have lightened, which is consistent with the overall decline in firearm violence, and the widespread concentration of injuries across North, West, and Southwest Philadelphia appear to become more sparse. However, many of the previously elevated tracts still show high rates.

+

Note: both periods use a fixed 2020–2024 ACS population denominator, which is good for consistent comparisons but does not capture population change over time.

Where elevated burden persisted

-

We classified each tract against one historical benchmark: the 75th percentile of 2015–2019 tract rates, approximately 13.52 events per 10,000 population per year

+

For this map, we wanted to see which tracts had high firearm violence in 2020-2022 and/or in 2023-2025, and we wanted to make the comparison meaningful and based on prior data. So, we compared each tract in each time period against one historical benchmark: the 75th percentile of the pre-pandemic 2015–2019 annual rates, approximately 13.52 events per 10,000 population per year. Then, we categorized each tract based on whether it fell above or below this benchmark in each time period.

+

"Persistently elevated" tracts are those that remained above the benchmark in both time periods. "Previously elevated" tracts were above the benchmark in the earlier period but are now below it. "Newly elevated" tracts are those that are now above the benchmark but were not in the earlier period. "Consistently below" tracts are those that have remained below the benchmark in both periods. The number of tracts in each category will appear next.

Transition counts will appear after the data load.

-

“Previously elevated” means below this benchmark in the recent period, not that violence disappeared. With a fixed benchmark and widespread declines, we do not expect many newly elevated tracts

-

tktktk - warn against causal inference, this is purely descriptive

+

As we can see, many tracts were previously elevated but have dropped below the benchmark, yet many also remained elevated, which is consistent with the visual patterns from the last two maps. What remains to be understood is the underlying differences between these groups, and how they compare in terms of their demographics, risk factors, and community needs.

+

Please note that “previously elevated” means below this benchmark in the recent period, not that violence disappeared. Also, with a fixed benchmark across both periods and widespread declines, we do not expect many newly elevated tracts.

+
Methods, sources, and aggregate data -

2020 Census tracts; pooled three-year counts divided by fixed population × 3, multiplied by 10,000. Officer-involved shootings were excluded. Event location =/= residence. Zero or missing populations produce unavailable rates

+

2020 Census tracts; pooled three-year counts divided by fixed 2020 population × 3, multiplied by 10,000. Officer-involved shootings were excluded. Event location =/= residence. Zero or missing populations produce unavailable rates, as well as special-use exclusions.

Sources: Philadelphia shooting-victim data (extract 2026-05-21); US Census Bureau 2020 geography and 2020–2024 ACS five-year total population

Download tract GeoJSON · Full metadata · Citywide annual counts

From fb74b86a7de0b00a8d2a840397f5d6556739cc71 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Tue, 22 Sep 2026 23:48:35 -0400 Subject: [PATCH 08/14] minor aesthetics --- css/index.css | 1 + js/index.js | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/css/index.css b/css/index.css index 9a8a27a7..44c367d3 100644 --- a/css/index.css +++ b/css/index.css @@ -63,6 +63,7 @@ body { background: white; padding: 0.4rem; font-size: 0.8rem; + font-style: italic; } .map-container { diff --git a/js/index.js b/js/index.js index 32b78acd..96cc203d 100644 --- a/js/index.js +++ b/js/index.js @@ -196,7 +196,7 @@ async function initialize() { if (!mapPanel.hidden) fitMap(); deck.calcCurrentSlideIndex(); }); - status.textContent = `Loaded ${city.length} annual counts and ${collection.features.length} tracts.`; + status.textContent = `(Loaded ${city.length} annual counts and ${collection.features.length} tracts.)`; } catch (error) { status.textContent = `Map unavailable: ${error.message} Fix the problem and reload the page.`; status.classList.add('error'); From 09c532a30e6eb67321c884c6c6ca389e3f317736 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Sun, 27 Sep 2026 16:22:54 -0400 Subject: [PATCH 09/14] accessibility edits --- index.html | 21 ++++--- js/index.js | 70 ++++++++++++--------- js/slidedeck.js | 13 ++-- js/stage-transition.js | 4 +- js/story-controls.js | 134 +++++++++++++++++++++++++++++++++++++++++ js/tract-content.js | 23 +++++++ 6 files changed, 222 insertions(+), 43 deletions(-) create mode 100644 js/story-controls.js create mode 100644 js/tract-content.js diff --git a/index.html b/index.html index 7f507923..6702019b 100644 --- a/index.html +++ b/index.html @@ -13,27 +13,32 @@ +

Firearm violence across space and time in Philadelphia, PA, 2015-2025

-

Jamie Song, MPH for MUSA 6110, Fall 2026 | Professor Mjumbe Poe

+

Jamie Song, MPH for MUSA 6110, Fall 2026 | Professor Mjumbe Poe

In the modern era, firearm violence in Philadelphia has been a persistent burden on public health and safety. In the past several years, the city experienced a sharp pandemic-era increase in firearm-related injuries, followed by a decline to historically low rates, a trend that continues through the present day (2026).

What remain unclear are how this citywide trend has manifested across different parts of the city, and whether some benefited more from the decline. In this storymap project, we pose the question: how evenly has firearm injury burden declined across the census tracts of Philadelphia?

To navigate this site, scroll through the sections below to see how firearm injury rates have changed across space and time in Philadelphia.

- +

Loading exports…

+

+
+

Philadelphia firearm injuries, 2015–2025

Annual counts, fatal and nonfatal combined; officer-involved shootings excluded. Source: Philadelphia Police Department via OpenDataPhilly.

@@ -85,12 +90,12 @@

Where elevated burden persisted

Sources: Philadelphia shooting-victim data (extract 2026-05-21); US Census Bureau 2020 geography and 2020–2024 ACS five-year total population

Download tract GeoJSON · Full metadata · Citywide annual counts

-
+
Read tract values without using the map -
+
- +
Events per 10,000 resident population per year; officer-involved shootings excluded
Tract GEOIDPeak countPeak rateRecent countRecent rateTransition
Tract (GEOID)Fixed ACS 2020–2024 population2020–2022 count2020–2022 rate2023–2025 count2023–2025 rateTransitionNotes and cautions
diff --git a/js/index.js b/js/index.js index 96cc203d..61366462 100644 --- a/js/index.js +++ b/js/index.js @@ -1,4 +1,5 @@ -import { SlideDeck } from './slidedeck.js'; +import { createStoryControls } from './story-controls.js'; +import { formatNumber, tractContent } from './tract-content.js'; import { renderCityChart } from './city-chart.js'; import { createStageTransition } from './stage-transition.js'; import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpacity } from './map-styles.js'; @@ -6,6 +7,14 @@ import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpac const status = document.querySelector('#load-status'); const legend = document.querySelector('#map-legend'); const slides = document.querySelectorAll('.slide'); +let mapStage; +const controls = createStoryControls(slides, (id, immediate) => { + if (mapStage) mapStage(id, immediate); + else { + document.querySelector('#chart-panel').hidden = id !== 'citywide'; + document.querySelector('#map-panel').hidden = id === 'citywide'; + } +}); const views = { 'peak': { field: 'peak_rate', title: '2020–2022: peak period' }, 'recent': { field: 'recent_rate', title: '2023–2025: recent decline' }, @@ -18,29 +27,18 @@ async function loadJSON(path) { return response.json(); } -function formatNumber(value, digits = 0) { - return Number.isFinite(value) - ? value.toLocaleString('en-US', { maximumFractionDigits: digits }) - : 'Unavailable'; -} - function tractDetails(feature) { - const p = feature.properties; + const p = tractContent(feature.properties); const content = document.createElement('div'); const lines = [ - `Tract ${p.tract_name} (${p.tract_geoid})`, - `2020–2022: ${formatNumber(p.peak_count)} shootings; rate ${formatNumber(p.peak_rate, 2)}`, - `2023–2025: ${formatNumber(p.recent_count)} shootings; rate ${formatNumber(p.recent_rate, 2)}`, + p.name, + `2020–2022: ${p.peakCount} shooting-victim occurrences; rate ${p.peakRate}`, + `2023–2025: ${p.recentCount} shooting-victim occurrences; rate ${p.recentRate}`, 'Rates: firearm injury rates per 10,000 resident population per year', - `Fixed population: ${formatNumber(p.fixed_population)}`, + `Fixed ACS 2020–2024 population: ${p.population}`, p.transition, + p.notes, ]; - if (p.low_population_flag) lines.push('Caution: fewer than 100 residents.'); - if (p.low_count_flag) lines.push('Caution: low event count in at least one period.'); - if (p.rate_exclusion_reason) lines.push(`Rate unavailable: ${p.rate_exclusion_reason}. Counts are retained.`); - if (p.zero_population_flag || p.missing_denominator_flag) { - lines.push('Rate unavailable because population is zero or missing. Counts are retained.'); - } for (const line of lines) { const paragraph = document.createElement('p'); paragraph.textContent = line; @@ -82,10 +80,13 @@ function populateTable(collection) { const body = document.querySelector('#tract-table-body'); const fragment = document.createDocumentFragment(); for (const feature of collection.features) { - const p = feature.properties; + const p = tractContent(feature.properties); const row = document.createElement('tr'); - const values = [p.tract_geoid, formatNumber(p.peak_count), formatNumber(p.peak_rate, 2), - formatNumber(p.recent_count), formatNumber(p.recent_rate, 2), p.transition]; + const heading = document.createElement('th'); + heading.scope = 'row'; + heading.textContent = p.name; + row.append(heading); + const values = [p.population, p.peakCount, p.peakRate, p.recentCount, p.recentRate, p.transition, p.notes]; for (const value of values) { const cell = document.createElement('td'); cell.textContent = value; @@ -93,12 +94,12 @@ function populateTable(collection) { } fragment.append(row); } - body.append(fragment); + body.replaceChildren(fragment); } async function initialize() { try { - // both requests finish before the scroll listener is attached + // presentation uses only validated R exports const [collection, metadata, city] = await Promise.all([ loadJSON('data/project1_tracts.geojson'), loadJSON('data/metadata.json'), @@ -131,7 +132,7 @@ async function initialize() { .join('; ') + '.'; populateTable(collection); renderCityChart(document.querySelector('#city-chart'), city); - if (!window.L) throw new Error('Leaflet did not load. The table is available; check your internet connection and reload.'); + if (!window.L) throw new Error('The map library did not load. Annual and tract tables are available; try reloading.'); // context tiles sit beneath the tract polygons; classification stays in the R exports const map = L.map('map', { scrollWheelZoom: false, zoomSnap: 0.25 }); @@ -143,6 +144,7 @@ async function initialize() { }); const tileStatus = document.querySelector('#tile-status'); basemap.on('tileerror', () => { + if (!tileStatus.hidden) return; tileStatus.textContent = 'Some basemap tiles could not load. Tract data and tables remain available.'; tileStatus.hidden = false; }); @@ -160,17 +162,21 @@ async function initialize() { const chartPanel = document.querySelector('#chart-panel'); const mapPanel = document.querySelector('#map-panel'); function fitMap() { + if (controls.collapsed || mapPanel.hidden) return; map.invalidateSize(); map.fitBounds(bounds, { padding: [16, 16], animate: false }); } function showStage(id) { const isChart = id === 'citywide'; const wasMapHidden = mapPanel.hidden; + const focused = document.activeElement; + if ((isChart && mapPanel.contains(focused)) || (!isChart && chartPanel.contains(focused)) + || focused?.closest('.leaflet-popup')) controls.focusHeading(id); chartPanel.hidden = !isChart; mapPanel.hidden = isChart; map.closePopup(); if (isChart) return; - if (!map.hasLayer(basemap)) basemap.addTo(map); + if (!controls.collapsed && !map.hasLayer(basemap)) basemap.addTo(map); if (id === 'orientation') { map.removeLayer(dataLayer); legend.replaceChildren(); @@ -190,15 +196,21 @@ async function initialize() { tractPane, showStage, window.matchMedia('(prefers-reduced-motion: reduce)'), ); - const deck = new SlideDeck(slides, transitionToStage); - document.addEventListener('scroll', () => deck.calcCurrentSlideIndex(), { passive: true }); + mapStage = (id, immediate) => transitionToStage(id, immediate || controls.collapsed); + controls.onReveal = () => { + mapStage(controls.currentId, true); + fitMap(); + }; + mapStage(controls.currentId, true); + fitMap(); window.addEventListener('resize', () => { if (!mapPanel.hidden) fitMap(); - deck.calcCurrentSlideIndex(); }); status.textContent = `(Loaded ${city.length} annual counts and ${collection.features.length} tracts.)`; } catch (error) { - status.textContent = `Map unavailable: ${error.message} Fix the problem and reload the page.`; + status.textContent = `Some visuals are unavailable: ${error.message} Narrative and download links remain available.`; + document.querySelector('#tile-status').hidden = false; + document.querySelector('#tile-status').textContent = 'Map unavailable. Use the narrative, available tables and download links.'; status.classList.add('error'); console.error(error); } diff --git a/js/slidedeck.js b/js/slidedeck.js index b29f42ac..76da8a54 100644 --- a/js/slidedeck.js +++ b/js/slidedeck.js @@ -7,16 +7,21 @@ class SlideDeck { this.calcCurrentSlideIndex(); } + select(id, source = 'scroll') { + const nextIndex = Array.from(this.slides).findIndex((slide) => slide.id === id); + if (nextIndex < 0 || nextIndex === this.currentSlideIndex) return false; + this.currentSlideIndex = nextIndex; + this.onSlideChange(id, source); + return true; + } + calcCurrentSlideIndex() { const threshold = window.innerHeight * 0.65; let nextIndex = 0; for (let i = 0; i < this.slides.length; i++) { if (this.slides[i].getBoundingClientRect().top <= threshold) nextIndex = i; } - if (nextIndex !== this.currentSlideIndex) { - this.currentSlideIndex = nextIndex; - this.onSlideChange(this.slides[nextIndex].id); - } + this.select(this.slides[nextIndex].id); } } diff --git a/js/stage-transition.js b/js/stage-transition.js index 93402e31..8dcda59a 100644 --- a/js/stage-transition.js +++ b/js/stage-transition.js @@ -5,11 +5,11 @@ export function createStageTransition(element, update, motion) { let initialized = false; let latestId; - async function show(id) { + async function show(id, immediate = false) { latestId = id; const current = ++revision; animation?.cancel(); - if (!initialized || motion.matches || !element.animate) { + if (immediate || !initialized || motion.matches || !element.animate) { initialized = true; update(id); return; diff --git a/js/story-controls.js b/js/story-controls.js new file mode 100644 index 00000000..ac26d0bd --- /dev/null +++ b/js/story-controls.js @@ -0,0 +1,134 @@ +import { SlideDeck } from './slidedeck.js'; + +export function compactInitially(width, height) { + return width <= 320 || height <= 500; +} + +export function createStoryControls(slides, onStage) { + const shell = document.querySelector('.map-container'); + const content = document.querySelector('#visual-content'); + const toggle = document.querySelector('#visual-toggle'); + const stageStatus = document.querySelector('#stage-status'); + const links = document.querySelectorAll('.chapter-nav a'); + let explicitNavigation = false; + let movingFocus = false; + const state = { + collapsed: compactInitially(window.innerWidth, window.innerHeight), + currentId: 'citywide', onReveal: () => {}, focusHeading, + }; + + function updateOffset() { + const narrow = window.matchMedia('(max-width: 800px)').matches; + const height = narrow ? shell.getBoundingClientRect().height : 0; + document.documentElement.style.setProperty('--visual-offset', `${height + 12}px`); + } + + function keepFocusVisible() { + const element = document.activeElement; + if (!element?.closest('.slide')) return; + const rect = element.getBoundingClientRect(); + const shellRect = shell.getBoundingClientRect(); + const covered = window.innerWidth <= 800 && shellRect.top <= 0; + const top = covered ? shellRect.bottom + 12 : 12; + if (rect.top < top) window.scrollBy({ top: rect.top - top, behavior: 'instant' }); + else if (rect.bottom > window.innerHeight && rect.height < window.innerHeight - top) { + window.scrollBy({ top: rect.bottom - window.innerHeight + 12, behavior: 'instant' }); + } + } + + function focusHeading(id) { + const heading = document.querySelector(`#${id} h2`); + heading.tabIndex = -1; + movingFocus = true; + heading.focus({ preventScroll: true }); + movingFocus = false; + requestAnimationFrame(keepFocusVisible); + } + + function setCollapsed() { + if (state.collapsed && content.contains(document.activeElement)) toggle.focus(); + content.hidden = state.collapsed; + shell.classList.toggle('is-collapsed', state.collapsed); + document.body.classList.toggle('visual-collapsed', state.collapsed); + toggle.hidden = false; + toggle.setAttribute('aria-expanded', String(!state.collapsed)); + toggle.textContent = state.collapsed ? 'Show visualization' : 'Hide visualization'; + updateOffset(); + } + setCollapsed(); + const deck = new SlideDeck(slides, (id, source) => { + state.currentId = id; + shell.dataset.stage = id; + for (const link of links) { + if (link.hash === `#${id}`) link.setAttribute('aria-current', 'step'); + else link.removeAttribute('aria-current'); + } + onStage(id, source !== 'scroll'); + }); + + function navigate(hash, focus = true) { + const id = hash.slice(1); + const isTable = id === 'tract-data'; + const slideId = isTable ? 'transitions' : id; + if (!Array.from(slides).some((slide) => slide.id === slideId)) return; + explicitNavigation = true; + deck.select(slideId, 'navigation'); + let target = document.getElementById(slideId); + if (isTable) { + document.querySelector('#tract-table-section').open = true; + target = document.querySelector('#tract-data'); + } + target.scrollIntoView({ block: 'start', behavior: 'instant' }); + if (focus) { + if (isTable) target.focus({ preventScroll: true }); + else focusHeading(slideId); + } + // headings already announce chapters; only the table shortcut needs extra context + stageStatus.textContent = isTable ? 'Tract data table opened. Counts, rates, population and cautions are available.' : ''; + requestAnimationFrame(keepFocusVisible); + } + document.addEventListener('click', (event) => { + const link = event.target.closest('a[href^="#"]'); + if (!link || event.ctrlKey || event.metaKey || event.shiftKey || event.altKey) return; + if (!['#tract-data', ...Array.from(slides, (slide) => `#${slide.id}`)].includes(link.hash)) return; + event.preventDefault(); + if (location.hash !== link.hash) history.pushState(null, '', link.hash); + navigate(link.hash); + }); + window.addEventListener('hashchange', () => navigate(location.hash)); + window.addEventListener('popstate', () => navigate(location.hash || '#citywide')); + document.querySelector('.slide-section').addEventListener('focusin', (event) => { + if (movingFocus) return; + const slide = event.target.closest('.slide'); + if (!slide) return; + explicitNavigation = true; + deck.select(slide.id, 'focus'); + requestAnimationFrame(keepFocusVisible); + }); + // explicit navigation owns the stage until the reader resumes page scrolling + const release = () => { explicitNavigation = false; }; + document.addEventListener('wheel', release, { passive: true }); + document.addEventListener('touchmove', release, { passive: true }); + document.addEventListener('pointerdown', release); + document.addEventListener('keydown', (event) => { + if (['ArrowDown', 'ArrowUp', 'PageDown', 'PageUp', 'Home', 'End', ' '].includes(event.key) + && !event.target.closest('.table-scroll, summary, button, #map')) release(); + }); + document.addEventListener('scroll', () => { + if (!explicitNavigation) deck.calcCurrentSlideIndex(); + }, { passive: true }); + toggle.addEventListener('click', () => { + explicitNavigation = true; + state.collapsed = !state.collapsed; + setCollapsed(); + if (!state.collapsed) state.onReveal(); + toggle.focus({ preventScroll: true }); + }); + window.addEventListener('resize', () => { + updateOffset(); + requestAnimationFrame(keepFocusVisible); + }); + new ResizeObserver(updateOffset).observe(shell); + if (location.hash) navigate(location.hash); + return state; +} diff --git a/js/tract-content.js b/js/tract-content.js new file mode 100644 index 00000000..c1db0d77 --- /dev/null +++ b/js/tract-content.js @@ -0,0 +1,23 @@ +export function formatNumber(value, digits = 0) { + return Number.isFinite(value) + ? value.toLocaleString('en-US', { maximumFractionDigits: digits }) + : 'Unavailable'; +} + +export function tractContent(p) { + const notes = []; + if (p.low_population_flag) notes.push('Caution: fewer than 100 residents.'); + if (p.low_count_flag) notes.push('Caution: low event count in at least one period.'); + if (p.rate_exclusion_reason) notes.push(`Rate unavailable: ${p.rate_exclusion_reason}. Counts are retained.`); + if (p.zero_population_flag || p.missing_denominator_flag) { + notes.push('Rate unavailable because population is zero or missing. Counts are retained.'); + } + return { + name: `Tract ${p.tract_name} (${p.tract_geoid})`, + population: formatNumber(p.fixed_population), + peakCount: formatNumber(p.peak_count), peakRate: formatNumber(p.peak_rate, 2), + recentCount: formatNumber(p.recent_count), recentRate: formatNumber(p.recent_rate, 2), + transition: p.transition, + notes: notes.join(' ') || 'No listed cautions; estimates still have uncertainty.', + }; +} From 6454e1fc22405cc3753c3f651069391d8692ec76 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Sun, 27 Sep 2026 16:44:41 -0400 Subject: [PATCH 10/14] accessibility for zooming --- css/index.css | 122 +++++++++++++++++++++++++++++++++++++++---- js/index.html | 110 ++++++++++++++++++++++++++++++++++++++ js/index.js | 20 ++++++- js/map-popup.js | 8 +++ js/story-controls.js | 4 +- 5 files changed, 252 insertions(+), 12 deletions(-) create mode 100644 js/index.html create mode 100644 js/map-popup.js diff --git a/css/index.css b/css/index.css index 44c367d3..cf8f0a6d 100644 --- a/css/index.css +++ b/css/index.css @@ -5,6 +5,63 @@ body { height: 100vh; font-family: 'IBM Plex Sans', sans-serif; + overflow-wrap: anywhere; +} + +html { + scroll-padding-top: var(--visual-offset, 12px); +} + +.byline { font-weight: 600; } + +a { + color: #145b80; + text-decoration: underline; +} + +.chapter-nav { + display: flex; + flex-wrap: wrap; + gap: 0.5rem; +} + +.chapter-nav a, +button, +summary { + box-sizing: border-box; + min-height: 44px; + padding: 0.5rem; +} + +button { font: inherit; } + +.chapter-nav a[aria-current] { font-weight: 600; } + +.visual-toolbar { + background: white; + padding: 0.25rem; + flex: 0 0 auto; +} + +.visual-content { + flex: 1; + min-height: 0; + position: relative; +} + +.map-container.is-collapsed { height: auto; } + + +.sr-only { + position: absolute; + width: 1px; + height: 1px; + padding: 0; + margin: -1px; + overflow: hidden; + clip-path: inset(50%); + white-space: nowrap; + border: 0; } [hidden] { @@ -27,12 +84,14 @@ body { box-sizing: border-box; display: flex; flex-direction: column; - justify-content: center; + justify-content: safe center; padding: 1.25rem; background: white; overflow: auto; } +.chart-panel > * { flex-shrink: 0; } + .chart-panel h2 { font-size: 1.2rem; } @@ -67,6 +126,8 @@ body { } .map-container { + display: flex; + flex-direction: column; position: sticky; top: 0; height: 100vh; @@ -83,6 +144,10 @@ body { filter: grayscale(1); } +.leaflet-control-attribution a { text-decoration: underline; } + +.leaflet-popup-content { margin: 12px 20px; } + .slide-section { position: relative; margin-top: -90vh; @@ -91,6 +156,8 @@ body { border-bottom: 1px solid rgb(0 0 0 / 10%); } +.visual-collapsed .slide-section { margin-top: 2rem; } + .slide { margin-top: 90vh; margin-bottom: 90vh; @@ -194,10 +261,6 @@ body { font-weight: bold; } -a { - color: #145b80; -} - :focus-visible { outline: 3px solid #0072b2; outline-offset: 3px; @@ -237,11 +300,48 @@ td { text-align: left; } -@media (width <= 800px) { +.table-scroll thead th { + position: sticky; + top: 0; + background: white; + z-index: 2; + box-shadow: 0 1px 0 #767676; +} + +#tract-data table { min-width: 55rem; } + +@media (prefers-reduced-motion: reduce) { + .slide-nav-button { transition: none; } +} + +@media (forced-colors: active) { + #city-chart rect { fill: Canvas; } + + #city-chart polyline, + #city-chart circle { + stroke: CanvasText; + } + + #city-chart circle { fill: CanvasText; } + #city-chart line { stroke: GrayText; } + #city-chart text { fill: CanvasText; } + :focus-visible { outline-color: Highlight; } +} + +@media (width <= 900px) { .map-panel { display: flex; flex-direction: column; min-height: 0; + overflow: auto; + } + + .tile-status { + position: static; + flex: 0 0 auto; + max-height: 4rem; + overflow: auto; + margin: 0; } .chart-panel { @@ -275,7 +375,7 @@ td { .map { flex: 1; - min-height: 0; + min-height: 8rem; height: auto; } @@ -289,7 +389,6 @@ td { margin-left: 1rem; margin-top: 55vh; margin-bottom: 55vh; - scroll-margin-top: 54vh; } .map-legend { @@ -298,7 +397,7 @@ td { box-sizing: border-box; overflow: auto; max-width: none; - font-size: 0.65rem; + font-size: 0.8rem; } .map-legend ul { @@ -307,3 +406,8 @@ td { gap: 0.15rem 0.5rem; } } + +@media (height <= 500px) and (width <= 900px) { + .map-container:not(.is-collapsed) { height: 50vh; } + .map-legend { flex-basis: 4rem; } +} diff --git a/js/index.html b/js/index.html new file mode 100644 index 00000000..6702019b --- /dev/null +++ b/js/index.html @@ -0,0 +1,110 @@ + + + + + + + Firearm violence across space and time in Philadelphia, PA, 2015-2025 + + + + + + + + + +
+
+

Firearm violence across space and time in Philadelphia, PA, 2015-2025

+

Jamie Song, MPH for MUSA 6110, Fall 2026 | Professor Mjumbe Poe

+

In the modern era, firearm violence in Philadelphia has been a persistent burden on public health and safety. In the past several years, the city experienced a sharp pandemic-era increase in firearm-related injuries, followed by a decline to historically low rates, a trend that continues through the present day (2026).

+

What remain unclear are how this citywide trend has manifested across different parts of the city, and whether some benefited more from the decline. In this storymap project, we pose the question: how evenly has firearm injury burden declined across the census tracts of Philadelphia?

+

To navigate this site, scroll through the sections below to see how firearm injury rates have changed across space and time in Philadelphia.

+ +

Loading exports…

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Philadelphia firearm injuries, 2015–2025

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Annual counts, fatal and nonfatal combined; officer-involved shootings excluded. Source: Philadelphia Police Department via OpenDataPhilly.

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The citywide trend

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Prior to the COVID-19 pandemic, firearm injuries in Philadelphia already represented a grave public health concern, with efforts to curb violence only met by steadily increasing shooting rates. Then, they surged in the wake of the 2020 lockdown, and dropped dramatically after 2022. In 2026, the city is on track to maintain its downward trend, reaching lows not seen since before firearm violence became a widespread public health issue.

+

Note: Counts include both fatal and nonfatal injuries.

+
+ View table of annual injury counts +
+ + + + +
Citywide firearm injuries
YearTotalFatalNonfatal
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From citywide counts to tract rates

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However, only looking at citywide trends can hide variation between different parts of the city. Some areas may have benefited more from the decline than others.

+

In the following maps, we will use firearm injury rates per 10,000 resident population, rather than raw counts, to compare disparities across the city. We will use Census tracts to represent these areas; however, please note that tracts are areas developed and used for US Census purposes, and they are not intended to represent neighborhoods.

+

Please also note that, like generalizing citywide trends to smaller parts of the city, tract-level firearm injury burden is not the same as a tract resident's individual risk.

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2020–2022: peak period

+

This map shows how firearm violence varied across the city during the post-pandemic years. Darker colors show higher annual firearm rates. Injury burden is most concentrated in areas of North Philadelphia, particularly in Kensington and along the Amtrak corridor, as well as West and Southwest Philadelphia.

+

Gray tracts indicate that the rate is unavailable, not that no shootings occurred. Certain tracts, such as parks, are excluded because their small populations make their rates unreliable.

+

Scroll down to compare the next period using the same color bins.

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+ +
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2023–2025: the recent decline

+

This map displays rates from more recent years. We can see that the colors across tracts have lightened, which is consistent with the overall decline in firearm violence, and the widespread concentration of injuries across North, West, and Southwest Philadelphia appear to become more sparse. However, many of the previously elevated tracts still show high rates.

+

Note: both periods use a fixed 2020–2024 ACS population denominator, which is good for consistent comparisons but does not capture population change over time.

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Where elevated burden persisted

+

For this map, we wanted to see which tracts had high firearm violence in 2020-2022 and/or in 2023-2025, and we wanted to make the comparison meaningful and based on prior data. So, we compared each tract in each time period against one historical benchmark: the 75th percentile of the pre-pandemic 2015–2019 annual rates, approximately 13.52 events per 10,000 population per year. Then, we categorized each tract based on whether it fell above or below this benchmark in each time period.

+

"Persistently elevated" tracts are those that remained above the benchmark in both time periods. "Previously elevated" tracts were above the benchmark in the earlier period but are now below it. "Newly elevated" tracts are those that are now above the benchmark but were not in the earlier period. "Consistently below" tracts are those that have remained below the benchmark in both periods. The number of tracts in each category will appear next.

+

Transition counts will appear after the data load.

+

As we can see, many tracts were previously elevated but have dropped below the benchmark, yet many also remained elevated, which is consistent with the visual patterns from the last two maps. What remains to be understood is the underlying differences between these groups, and how they compare in terms of their demographics, risk factors, and community needs.

+

Please note that “previously elevated” means below this benchmark in the recent period, not that violence disappeared. Also, with a fixed benchmark across both periods and widespread declines, we do not expect many newly elevated tracts.

+ +
+ Methods, sources, and aggregate data +

2020 Census tracts; pooled three-year counts divided by fixed 2020 population × 3, multiplied by 10,000. Officer-involved shootings were excluded. Event location =/= residence. Zero or missing populations produce unavailable rates, as well as special-use exclusions.

+

Sources: Philadelphia shooting-victim data (extract 2026-05-21); US Census Bureau 2020 geography and 2020–2024 ACS five-year total population

+

Download tract GeoJSON · Full metadata · Citywide annual counts

+
+
+ Read tract values without using the map +
+ + + + +
Events per 10,000 resident population per year; officer-involved shootings excluded
Tract (GEOID)Fixed ACS 2020–2024 population2020–2022 count2020–2022 rate2023–2025 count2023–2025 rateTransitionNotes and cautions
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+
+
+ + + + + diff --git a/js/index.js b/js/index.js index 61366462..f940931e 100644 --- a/js/index.js +++ b/js/index.js @@ -1,5 +1,6 @@ import { createStoryControls } from './story-controls.js'; import { formatNumber, tractContent } from './tract-content.js'; +import { popupOptions } from './map-popup.js'; import { renderCityChart } from './city-chart.js'; import { createStageTransition } from './stage-transition.js'; import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpacity } from './map-styles.js'; @@ -155,16 +156,33 @@ async function initialize() { const dataLayer = L.geoJSON(collection, { pane: 'tracts', style: (feature) => tractStyle(feature.properties, 'peak_rate'), - onEachFeature: (feature, layer) => layer.bindPopup(tractDetails(feature)), + onEachFeature: (feature, layer) => layer.bindPopup(() => { + const size = map.getSize(); + Object.assign(layer.getPopup().options, popupOptions(size.x, size.y)); + return tractDetails(feature); + }), }); const bounds = dataLayer.getBounds(); if (!bounds.isValid()) throw new Error('The tract layer has no valid bounds.'); + function fitPopup(popup) { + const size = map.getSize(); + Object.assign(popup.options, popupOptions(size.x, size.y)); + popup.update(); + const content = popup.getElement().querySelector('.leaflet-popup-content'); + content.tabIndex = 0; + content.setAttribute('role', 'region'); + content.setAttribute('aria-label', 'Tract details; scroll to read all values and cautions'); + } + map.on('popupopen', (event) => fitPopup(event.popup)); const chartPanel = document.querySelector('#chart-panel'); const mapPanel = document.querySelector('#map-panel'); function fitMap() { if (controls.collapsed || mapPanel.hidden) return; map.invalidateSize(); map.fitBounds(bounds, { padding: [16, 16], animate: false }); + dataLayer.eachLayer((layer) => { + if (layer.isPopupOpen()) fitPopup(layer.getPopup()); + }); } function showStage(id) { const isChart = id === 'citywide'; diff --git a/js/map-popup.js b/js/map-popup.js new file mode 100644 index 00000000..8c3178b3 --- /dev/null +++ b/js/map-popup.js @@ -0,0 +1,8 @@ +export function popupOptions(width, height) { + return { + maxWidth: Math.max(80, Math.min(300, width - 110)), + maxHeight: Math.max(24, Math.min(320, height - 126)), + autoPanPaddingTopLeft: [50, 8], + autoPanPaddingBottomRight: [8, 36], + }; +} diff --git a/js/story-controls.js b/js/story-controls.js index ac26d0bd..554ea622 100644 --- a/js/story-controls.js +++ b/js/story-controls.js @@ -18,7 +18,7 @@ export function createStoryControls(slides, onStage) { }; function updateOffset() { - const narrow = window.matchMedia('(max-width: 800px)').matches; + const narrow = window.matchMedia('(max-width: 900px)').matches; const height = narrow ? shell.getBoundingClientRect().height : 0; document.documentElement.style.setProperty('--visual-offset', `${height + 12}px`); } @@ -28,7 +28,7 @@ export function createStoryControls(slides, onStage) { if (!element?.closest('.slide')) return; const rect = element.getBoundingClientRect(); const shellRect = shell.getBoundingClientRect(); - const covered = window.innerWidth <= 800 && shellRect.top <= 0; + const covered = window.innerWidth <= 900 && shellRect.top <= 0; const top = covered ? shellRect.bottom + 12 : 12; if (rect.top < top) window.scrollBy({ top: rect.top - top, behavior: 'instant' }); else if (rect.bottom > window.innerHeight && rect.height < window.innerHeight - top) { From a44b6ea2154e0199fe99f0971af8374eb917d30f Mon Sep 17 00:00:00 2001 From: frogzorz Date: Sun, 27 Sep 2026 17:11:09 -0400 Subject: [PATCH 11/14] aesthetic tweaks replacing B/W with phila gov color scheme --- css/index.css | 65 +++++++++++++++++++++++++++++++++++++++--------- js/city-chart.js | 10 ++++---- 2 files changed, 58 insertions(+), 17 deletions(-) diff --git a/css/index.css b/css/index.css index cf8f0a6d..189d9336 100644 --- a/css/index.css +++ b/css/index.css @@ -1,9 +1,7 @@ body { margin: 0; - border-width: 0; box-sizing: border-box; height: 100vh; - font-family: 'IBM Plex Sans', sans-serif; overflow-wrap: anywhere; } @@ -15,7 +13,7 @@ html { .byline { font-weight: 600; } a { - color: #145b80; + color: #0f4d90; text-decoration: underline; } @@ -30,12 +28,30 @@ button, summary { box-sizing: border-box; min-height: 44px; - padding: 0.5rem; + padding: 0.5rem 1rem; + border-radius: 4px; +} +.chapter-nav a { + background-color: #0f4d90; + color: #ffffff; + text-decoration: none; + font-weight: 700; + border: 2px solid #0f4d90; +} +.chapter-nav a:hover, +.chapter-nav a:focus-visible { + background-color: #f3c613; + border-color: #f3c613; + color: #000000; } button { font: inherit; } -.chapter-nav a[aria-current] { font-weight: 600; } +.chapter-nav a[aria-current] { + background-color: #25cef7; + border-color: #25cef7; + color: #0f4d90; +} .visual-toolbar { background: white; @@ -69,12 +85,34 @@ button { font: inherit; } } .story-intro { + box-sizing: border-box; + width: calc(100% - 2rem); max-width: 60rem; - margin: 0 auto; - padding: 3rem 1.5rem; + margin: 2rem auto; + padding: 2rem 3rem; line-height: 1.55; + background-color: #ffffff; + color: #0f4d90; + + border-radius: 4px; + box-shadow: 0 4px 12px rgba(15, 77, 144, 0.2); +} +.story-intro > * { + max-width: none; +} + +.story-intro h1 { + background-color: #0f4d90; + color: #ffffff; + margin: -2rem -3rem 2rem -3rem; + padding: 2rem 3rem; + border-bottom: 6px solid #f3c613; + border-top-left-radius: 4px; + border-top-right-radius: 4px; } + + .map-panel { height: 100%; } @@ -163,10 +201,11 @@ button { font: inherit; } margin-bottom: 90vh; margin-left: auto; margin-right: 2rem; - padding: 1rem; - box-shadow: -0.5rem 0 1rem rgba(0 0 0 / 50%); - border: 1px solid gray; - border-radius: 0.5rem; + padding: 1.5rem; + box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); + border: 1px solid #dcdcdc; + border-top: 6px solid #0f4d90; + border-radius: 4px; pointer-events: initial; width: 25rem; @@ -262,7 +301,7 @@ button { font: inherit; } } :focus-visible { - outline: 3px solid #0072b2; + outline: 3px solid #2176d2; outline-offset: 3px; } @@ -411,3 +450,5 @@ td { .map-container:not(.is-collapsed) { height: 50vh; } .map-legend { flex-basis: 4rem; } } + +.chart-panel h2 { color: #0f4d90; } \ No newline at end of file diff --git a/js/city-chart.js b/js/city-chart.js index 78a313be..f5cd8d67 100644 --- a/js/city-chart.js +++ b/js/city-chart.js @@ -25,9 +25,9 @@ function renderCityChart(container, rows) { svg.append(svgElement('desc', { id: 'city-chart-description' }, 'Annual counts, including fatal and nonfatal victims, excluding officer-involved shootings. Exact values are in the annual-count table.')); for (const [start, end, label, color] of [ - [2014.5, 2019.5, 'Baseline', '#E6EFF5'], - [2019.5, 2022.5, 'Peak', '#FAEBDD'], - [2022.5, 2025.5, 'Recent decline', '#E4F0E9'], + [2014.5, 2019.5, 'Baseline', '#DAEDFE'], + [2019.5, 2022.5, 'Peak', '#fed0d0'], + [2022.5, 2025.5, 'Recent decline', '#b9f2b1'], ]) { svg.append(svgElement('rect', { x: x(start), y: 55, width: x(end) - x(start), height: 255, fill: color })); svg.append(svgElement('text', { 'x': (x(start) + x(end)) / 2, 'y': 42, 'text-anchor': 'middle' }, label)); @@ -36,9 +36,9 @@ function renderCityChart(container, rows) { svg.append(svgElement('line', { x1: 65, x2: 665, y1: y(count), y2: y(count), stroke: '#FFFFFF' })); svg.append(svgElement('text', { 'x': 57, 'y': y(count) + 5, 'text-anchor': 'end' }, count.toLocaleString('en-US'))); } - svg.append(svgElement('polyline', { 'points': points.map((p) => `${p.x},${p.y}`).join(' '), 'fill': 'none', 'stroke': '#145B80', 'stroke-width': 3 })); + svg.append(svgElement('polyline', { 'points': points.map((p) => `${p.x},${p.y}`).join(' '), 'fill': 'none', 'stroke': '#0f4d90', 'stroke-width': 3 })); for (const point of points) { - const circle = svgElement('circle', { cx: point.x, cy: point.y, r: 4, fill: '#145B80' }); + const circle = svgElement('circle', { cx: point.x, cy: point.y, r: 4, fill: '#0f4d90' }); circle.append(svgElement('title', {}, `${point.year}: ${point.total.toLocaleString('en-US')} victims`)); svg.append(circle); svg.append(svgElement('text', { 'x': point.x, 'y': 334, 'text-anchor': 'middle', 'class': 'chart-year' }, point.year)); From b62d295091d33a5ad4b9da05ee7498d6509ab813 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Wed, 21 Oct 2026 13:57:08 -0400 Subject: [PATCH 12/14] data validation --- js/data-validation.js | 43 ++++++++++++++++++++++++++++++++ js/index.js | 58 +++++++++++++++++++++++-------------------- 2 files changed, 74 insertions(+), 27 deletions(-) create mode 100644 js/data-validation.js diff --git a/js/data-validation.js b/js/data-validation.js new file mode 100644 index 00000000..3aafd7b3 --- /dev/null +++ b/js/data-validation.js @@ -0,0 +1,43 @@ +import { transitionColors } from './map-styles.js'; + +function requireValue(condition, message) { + if (!condition) throw new Error(message); +} + +const count = (value) => Number.isInteger(value) && value >= 0; +const nullableNumber = (value) => value === null || (Number.isFinite(value) && value >= 0); + +export function validateCity(city) { + requireValue(Array.isArray(city) && city.length === 11, 'Expected 11 citywide years.'); + city.forEach((row, i) => { + requireValue(row.year === 2015 + i && [row.total, row.fatal, row.nonfatal].every(count) + && row.total === row.fatal + row.nonfatal, 'Invalid citywide years or victim counts.'); + requireValue(row.period === (row.year <= 2019 ? 'baseline' : row.year <= 2022 ? 'peak' : 'recent_decline'), 'Unexpected citywide period.'); + }); + return city; +} + +export function validateTracts(collection, metadata) { + requireValue(metadata?.baseline_percentile === 0.75 && Number.isFinite(metadata.benchmark_rate_10k) + && metadata.benchmark_rate_10k > 0 && typeof metadata.generation_timestamp === 'string' + && metadata.generation_timestamp.length > 0, 'Metadata must describe the fixed baseline benchmark and generation timestamp.'); + requireValue(collection?.type === 'FeatureCollection' && collection.features?.length === 408, 'Expected 408 Philadelphia tract polygons.'); + const ids = new Set(); + for (const feature of collection.features) { + const p = feature.properties; + requireValue(['Polygon', 'MultiPolygon'].includes(feature.geometry?.type) + && Array.isArray(feature.geometry.coordinates) && feature.geometry.coordinates.length > 0, + 'Tract export must contain polygon coordinates, never event points.'); + requireValue(p && /^42101\d{6}$/.test(p.tract_geoid) && !ids.has(p.tract_geoid), 'Invalid or duplicated tract GEOID.'); + ids.add(p.tract_geoid); + requireValue(typeof p.tract_name === 'string' && [p.peak_count, p.recent_count].every(count) + && [p.fixed_population, p.peak_rate, p.recent_rate].every(nullableNumber) + && Object.hasOwn(transitionColors, p.transition), 'Invalid tract counts, rates, population or category.'); + requireValue(Number.isFinite(p.benchmark_rate_10k) + && Math.abs(p.benchmark_rate_10k - metadata.benchmark_rate_10k) < 1e-10, 'Tract and metadata benchmarks disagree.'); + if (!(p.fixed_population > 0) || p.special_use_flag) { + requireValue(p.peak_rate === null && p.recent_rate === null && p.transition === 'Unavailable', 'Ineligible tract has an available rate or classification.'); + } + } + return collection; +} diff --git a/js/index.js b/js/index.js index f940931e..056d8480 100644 --- a/js/index.js +++ b/js/index.js @@ -2,6 +2,7 @@ import { createStoryControls } from './story-controls.js'; import { formatNumber, tractContent } from './tract-content.js'; import { popupOptions } from './map-popup.js'; import { renderCityChart } from './city-chart.js'; +import { validateCity, validateTracts } from './data-validation.js'; import { createStageTransition } from './stage-transition.js'; import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpacity } from './map-styles.js'; @@ -98,32 +99,14 @@ function populateTable(collection) { body.replaceChildren(fragment); } -async function initialize() { +async function initializeMap() { try { // presentation uses only validated R exports - const [collection, metadata, city] = await Promise.all([ + const [collection, metadata] = await Promise.all([ loadJSON('data/project1_tracts.geojson'), loadJSON('data/metadata.json'), - loadJSON('data/city_year.json'), ]); - if (collection.type !== 'FeatureCollection' || !collection.features?.length) { - throw new Error('The tract export is empty or is not a GeoJSON FeatureCollection.'); - } - const required = ['tract_geoid', 'tract_name', 'peak_count', 'peak_rate', - 'recent_count', 'recent_rate', 'transition', 'fixed_population']; - const seen = new Set(); - for (const feature of collection.features) { - const p = feature.properties; - if (!['Polygon', 'MultiPolygon'].includes(feature.geometry?.type) - || !p || required.some((key) => !Object.hasOwn(p, key)) - || seen.has(p.tract_geoid) || !Object.hasOwn(transitionColors, p.transition)) { - throw new Error('The tract export has invalid geometry types, fields, IDs, or categories.'); - } - seen.add(p.tract_geoid); - } - if (!Number.isFinite(metadata.benchmark_rate_10k) || metadata.baseline_percentile !== 0.75) { - throw new Error('The metadata does not describe the expected baseline benchmark.'); - } + validateTracts(collection, metadata); // narrative placeholders are optional; removing one must not prevent the map loading const benchmark = document.querySelector('#benchmark'); if (benchmark) benchmark.textContent = formatNumber(metadata.benchmark_rate_10k, 2); @@ -132,8 +115,7 @@ async function initialize() { .map((label) => `${label}: ${collection.features.filter((f) => f.properties.transition === label).length}`) .join('; ') + '.'; populateTable(collection); - renderCityChart(document.querySelector('#city-chart'), city); - if (!window.L) throw new Error('The map library did not load. Annual and tract tables are available; try reloading.'); + if (!window.L) throw new Error('The map library did not load. The tract table is available; try reloading.'); // context tiles sit beneath the tract polygons; classification stays in the R exports const map = L.map('map', { scrollWheelZoom: false, zoomSnap: 0.25 }); @@ -224,14 +206,36 @@ async function initialize() { window.addEventListener('resize', () => { if (!mapPanel.hidden) fitMap(); }); - status.textContent = `(Loaded ${city.length} annual counts and ${collection.features.length} tracts.)`; + return `${collection.features.length} tracts`; } catch (error) { - status.textContent = `Some visuals are unavailable: ${error.message} Narrative and download links remain available.`; document.querySelector('#tile-status').hidden = false; document.querySelector('#tile-status').textContent = 'Map unavailable. Use the narrative, available tables and download links.'; - status.classList.add('error'); - console.error(error); + throw error; } } +async function initializeCity() { + try { + const city = validateCity(await loadJSON('data/city_year.json')); + renderCityChart(document.querySelector('#city-chart'), city); + return `${city.length} annual counts`; + } catch (error) { + const message = document.createElement('p'); + message.className = 'error'; + message.textContent = 'Citywide chart and annual table unavailable. Try reloading or use the download link.'; + document.querySelector('#city-chart').replaceChildren(message); + throw error; + } +} + +async function initialize() { + const results = await Promise.allSettled([initializeCity(), initializeMap()]); + const loaded = results.filter((result) => result.status === 'fulfilled').map((result) => result.value); + const failed = results.filter((result) => result.status === 'rejected').map((result) => result.reason.message); + status.classList.toggle('error', failed.length > 0); + status.textContent = failed.length + ? `Some visuals are unavailable: ${failed.join(' ')} ${loaded.length ? `Loaded ${loaded.join(' and ')}.` : ''} Narrative and download links remain available.` + : `(Loaded ${loaded.join(' and ')}.)`; +} + initialize(); From cc66f7c6fb2e6c08bf7f1d0bd1183f38a08d8ea2 Mon Sep 17 00:00:00 2001 From: frogzorz Date: Wed, 21 Oct 2026 13:57:28 -0400 Subject: [PATCH 13/14] minor styling adjustments --- css/index.css | 33 +++++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 10 deletions(-) diff --git a/css/index.css b/css/index.css index 189d9336..550cfa0f 100644 --- a/css/index.css +++ b/css/index.css @@ -17,6 +17,8 @@ a { text-decoration: underline; } +.leaflet-control-attribution a { text-decoration: underline; } + .chapter-nav { display: flex; flex-wrap: wrap; @@ -31,18 +33,20 @@ summary { padding: 0.5rem 1rem; border-radius: 4px; } + .chapter-nav a { background-color: #0f4d90; - color: #ffffff; + color: #fff; text-decoration: none; font-weight: 700; border: 2px solid #0f4d90; } + .chapter-nav a:hover, .chapter-nav a:focus-visible { background-color: #f3c613; border-color: #f3c613; - color: #000000; + color: #000; } button { font: inherit; } @@ -51,6 +55,8 @@ button { font: inherit; } background-color: #25cef7; border-color: #25cef7; color: #0f4d90; + text-decoration: underline; + text-underline-offset: 0.2em; } .visual-toolbar { @@ -91,20 +97,21 @@ button { font: inherit; } margin: 2rem auto; padding: 2rem 3rem; line-height: 1.55; - background-color: #ffffff; + background-color: #fff; color: #0f4d90; border-radius: 4px; - box-shadow: 0 4px 12px rgba(15, 77, 144, 0.2); + box-shadow: 0 4px 12px rgb(15 77 144 / 20%); } + .story-intro > * { max-width: none; } .story-intro h1 { background-color: #0f4d90; - color: #ffffff; - margin: -2rem -3rem 2rem -3rem; + color: #fff; + margin: -2rem -3rem 2rem; padding: 2rem 3rem; border-bottom: 6px solid #f3c613; border-top-left-radius: 4px; @@ -132,6 +139,7 @@ button { font: inherit; } .chart-panel h2 { font-size: 1.2rem; + color: #0f4d90; } .chart-panel p { @@ -182,8 +190,6 @@ button { font: inherit; } filter: grayscale(1); } -.leaflet-control-attribution a { text-decoration: underline; } - .leaflet-popup-content { margin: 12px 20px; } .slide-section { @@ -202,7 +208,7 @@ button { font: inherit; } margin-left: auto; margin-right: 2rem; padding: 1.5rem; - box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); + box-shadow: 0 4px 12px rgb(0 0 0 / 10%); border: 1px solid #dcdcdc; border-top: 6px solid #0f4d90; border-radius: 4px; @@ -451,4 +457,11 @@ td { .map-legend { flex-basis: 4rem; } } -.chart-panel h2 { color: #0f4d90; } \ No newline at end of file +@media (width <= 600px) { + .story-intro { padding: 2rem 1.25rem; } + + .story-intro h1 { + margin-inline: -1.25rem; + padding-inline: 1.25rem; + } +} From d921c8edb8079b56c680803a0dc67187caafb59c Mon Sep 17 00:00:00 2001 From: frogzorz Date: Wed, 21 Oct 2026 16:08:57 -0400 Subject: [PATCH 14/14] add address search add search tract by street address to final slide --- css/index.css | 121 ++++++++++++++++++++++++++++++ index.html | 34 ++++++++- js/address-search.js | 170 +++++++++++++++++++++++++++++++++++++++++++ js/index.js | 89 ++++++++++++++++++++-- js/map-styles.js | 7 +- 5 files changed, 406 insertions(+), 15 deletions(-) create mode 100644 js/address-search.js diff --git a/css/index.css b/css/index.css index 550cfa0f..86eeea6b 100644 --- a/css/index.css +++ b/css/index.css @@ -60,11 +60,21 @@ button { font: inherit; } } .visual-toolbar { + display: flex; + flex-wrap: wrap; + gap: 0.5rem; background: white; padding: 0.25rem; flex: 0 0 auto; } +.map-reset-controls { flex-basis: 100%; } + +.visual-collapsed .map-reset-controls, +.map-container[data-stage="citywide"] .map-reset-controls, +.visual-collapsed #map-reset, +.map-container[data-stage="citywide"] #map-reset { display: none; } + .visual-content { flex: 1; min-height: 0; @@ -355,6 +365,117 @@ td { #tract-data table { min-width: 55rem; } +.address-form { + margin: 1.25rem 0; +} + +.address-form fieldset { + min-width: 0; + margin: 0; + padding: 0.75rem 1rem 1rem; + border: 1px solid #767676; + border-radius: 4px; +} + +.address-form legend { + padding: 0 0.25rem; + font-weight: 600; + color: #0f4d90; +} + +.address-form label { + display: block; + margin-top: 0.5rem; +} + +.address-form input { + display: block; + box-sizing: border-box; + width: 100%; + min-height: 44px; + margin-top: 0.25rem; + padding: 0.4rem 0.5rem; + border: 1px solid #555; + border-radius: 4px; + font: inherit; +} + +.address-buttons { + display: flex; + flex-wrap: wrap; + gap: 0.5rem; + margin-top: 0.75rem; +} + +.address-buttons button { + border: 2px solid #0f4d90; + background-color: #fff; + color: #0f4d90; + font-weight: 600; + cursor: pointer; +} + +.address-buttons button:hover { + background-color: #f3c613; + border-color: #f3c613; + color: #000; +} + +.address-buttons button:disabled { + opacity: 0.6; + cursor: wait; +} + +.address-note { + font-size: 0.85rem; + color: #444; +} + +#address-zip { max-width: 9rem; } + +#address-submit { + background-color: #0f4d90; + color: #fff; +} + +#address-status { + padding: 0.5rem 0.75rem; + border-left: 4px solid #0f4d90; + background-color: #f1f5fa; +} + +/* the live region stays rendered so screen readers announce later updates */ +#address-status:empty { + padding: 0; + border: 0; +} + +#address-results { + margin: 0; + padding: 0; + list-style: none; +} + +#address-results:empty { display: none; } +#address-results li + li { margin-top: 0.5rem; } + +#address-results button { + width: 100%; + border: 2px solid #0f4d90; + background-color: #fff; + color: #0f4d90; + font-weight: 600; + text-align: left; + cursor: pointer; +} + +#address-submit:hover, +#address-results button:hover { + background-color: #f3c613; + border-color: #f3c613; + color: #000; +} + @media (prefers-reduced-motion: reduce) { .slide-nav-button { transition: none; } } diff --git a/index.html b/index.html index 6702019b..0b44ad91 100644 --- a/index.html +++ b/index.html @@ -9,7 +9,7 @@ - + @@ -27,7 +27,12 @@

Firearm violence across space and time in Philadelphia, PA, 2015-2025

-
+
+ +
+ +
+

Philadelphia firearm injuries, 2015–2025

@@ -83,7 +88,28 @@

Where elevated burden persisted

Transition counts will appear after the data load.

As we can see, many tracts were previously elevated but have dropped below the benchmark, yet many also remained elevated, which is consistent with the visual patterns from the last two maps. What remains to be understood is the underlying differences between these groups, and how they compare in terms of their demographics, risk factors, and community needs.

Please note that “previously elevated” means below this benchmark in the recent period, not that violence disappeared. Also, with a fixed benchmark across both periods and widespread declines, we do not expect many newly elevated tracts.

- + +

Search a Philadelphia address to find its Census tract and compare its injury rates and elevated-burden category.

+
+
+ Find a census tract by street address + + +
+ + +
+
+

The tract is highlighted on the map and its values open in a popup. Matches are approximate, so confirm the returned address.

+

Your address is sent to the US Census Bureau geocoder for lookup and is not stored by this site.

+

+
    +
    +
    Methods, sources, and aggregate data

    2020 Census tracts; pooled three-year counts divided by fixed 2020 population × 3, multiplied by 10,000. Officer-involved shootings were excluded. Event location =/= residence. Zero or missing populations produce unavailable rates, as well as special-use exclusions.

    @@ -105,6 +131,6 @@

    Where elevated burden persisted

    - + diff --git a/js/address-search.js b/js/address-search.js new file mode 100644 index 00000000..cd4dbf98 --- /dev/null +++ b/js/address-search.js @@ -0,0 +1,170 @@ +// adapted from dashboard-project/js/address-search.js: key-free Census geocoder lookup +// the address is used only for this request; no coordinates or addresses are stored +const endpoint = 'https://geocoding.geo.census.gov/geocoder/geographies/address'; +const vintage = 'Census2020_Current'; +let nextRequest = 0; +const registries = new WeakMap(); + +// build a Philadelphia-scoped request returning 2020 Census tract geography +export function addressURL(street, zip, callback) { + if (!/^\d\S*\s+\S/.test(street.trim()) || street.length > 200) { + throw new Error('Enter a street number and street name.'); + } + if (zip && !/^\d{5}$/.test(zip)) throw new Error('Enter a five-digit ZIP code or leave it blank.'); + if (!/^phlAddressCallbacks\.lookup\d+$/.test(callback)) throw new Error('Invalid lookup callback.'); + const url = new URL(endpoint); + url.search = new URLSearchParams({ street: street.trim(), city: 'Philadelphia', state: 'PA', + zip, benchmark: 'Public_AR_Current', vintage, layers: 'Census Tracts', format: 'jsonp', callback }); + return url; +} + +// Census documents JSONP as its browser transport (it does not support CORS) +export function requestAddress(street, zip, { signal, timeout = 20000, + ownerWindow = window, ownerDocument = document } = {}) { + let registry = registries.get(ownerWindow); + if (!registry) { + // late responses after cancellation resolve to a no-op, not a stale selection + registry = new Proxy(Object.create(null), { get: (target, name) => target[name] || (() => {}) }); + ownerWindow.phlAddressCallbacks = registry; + registries.set(ownerWindow, registry); + } + const id = `lookup${++nextRequest}`; + const url = addressURL(street, zip, `phlAddressCallbacks.${id}`); + return new Promise((resolve, reject) => { + const script = ownerDocument.createElement('script'); + let settled = false; + let timer = null; + const finish = (error, response) => { + if (settled) return; + settled = true; + clearTimeout(timer); + signal?.removeEventListener('abort', cancel); + script.remove(); + delete registry[id]; + if (error) reject(error); + else resolve(response); + }; + const cancel = () => finish(new Error('cancelled')); + registry[id] = (response) => finish(null, response); + script.src = url.href; + script.referrerPolicy = 'no-referrer'; + script.onerror = () => finish(new Error('unavailable')); + script.onload = () => { + if (!settled) finish(new Error('unavailable')); + }; + if (signal?.aborted) { + cancel(); + return; + } + signal?.addEventListener('abort', cancel, { once: true }); + timer = setTimeout(() => finish(new Error('unavailable')), timeout); + ownerDocument.head.append(script); + }); +} + +// accept only unambiguous 2020 tract IDs that exist in the story's R export +export function addressMatches(response, features) { + if (response?.result?.input?.vintage?.vintageName !== vintage + || !Array.isArray(response?.result?.addressMatches)) { + throw new Error('Invalid Census response.'); + } + const matches = []; + const seen = new Set(); + for (const match of response.result.addressMatches) { + const tracts = match.geographies?.['Census Tracts']; + if (!Array.isArray(tracts) || tracts.length !== 1) continue; + const geoid = tracts[0].GEOID; + if (typeof geoid !== 'string' || !/^42101\d{6}$/.test(geoid) || !features.has(geoid) + || typeof match.matchedAddress !== 'string' || match.matchedAddress.length > 300) continue; + const key = `${geoid}:${match.matchedAddress}`; + if (seen.has(key)) continue; + seen.add(key); + matches.push({ geoid, label: match.matchedAddress, tractName: features.get(geoid).properties.tract_name }); + } + return matches; +} + +// one match selects its tract immediately; several matches ask the reader to choose +export function initializeAddressSearch(collection, selectTract, clearSelection, lookup = requestAddress) { + const form = document.querySelector('#address-form'); + const street = document.querySelector('#address-street'); + const zip = document.querySelector('#address-zip'); + const submit = document.querySelector('#address-submit'); + const status = document.querySelector('#address-status'); + const results = document.querySelector('#address-results'); + const features = new Map(collection.features.map((f) => [f.properties.tract_geoid, f])); + let controller; + let sequence = 0; + const clearLookup = () => { + sequence += 1; + controller?.abort(); + controller = null; + submit.disabled = false; + form.removeAttribute('aria-busy'); + results.replaceChildren(); + status.textContent = ''; + }; + const choose = (match) => { + const summary = selectTract(match.geoid); + if (summary) status.textContent = `${match.label} is in ${summary}`; + }; + street.addEventListener('input', clearLookup); + zip.addEventListener('input', clearLookup); + document.querySelector('#address-clear').addEventListener('click', () => { + clearLookup(); + street.value = ''; + zip.value = ''; + clearSelection(); + status.textContent = 'Address cleared and map reset.'; + street.focus(); + }); + form.addEventListener('submit', async (event) => { + event.preventDefault(); + clearLookup(); + try { + addressURL(street.value.trim(), zip.value.trim(), 'phlAddressCallbacks.lookup0'); + } catch (error) { + status.textContent = error.message; + return; + } + const current = sequence; + controller = new AbortController(); + submit.disabled = true; + form.setAttribute('aria-busy', 'true'); + status.textContent = 'Looking up the address with the US Census Bureau…'; + try { + const response = await lookup(street.value.trim(), zip.value.trim(), { signal: controller.signal }); + if (current !== sequence) return; + const matches = addressMatches(response, features); + if (!matches.length) { + status.textContent = 'No matching Philadelphia tract. Check the street number, name and ZIP code.'; + return; + } + if (matches.length === 1) { + choose(matches[0]); + return; + } + for (const match of matches) { + const item = document.createElement('li'); + const button = document.createElement('button'); + button.type = 'button'; + button.textContent = `${match.label} (tract ${match.tractName})`; + button.addEventListener('click', () => { + if (current === sequence) choose(match); + }); + item.append(button); + results.append(item); + } + status.textContent = `${matches.length} possible matches. Choose the correct address below.`; + } catch { + if (current === sequence) status.textContent = 'Census address lookup is unavailable. Try again, or use the tract table.'; + } finally { + if (current === sequence) { + submit.disabled = false; + form.removeAttribute('aria-busy'); + controller = null; + } + } + }); + document.querySelector('#address-controls').disabled = false; +} diff --git a/js/index.js b/js/index.js index 056d8480..c806c4b9 100644 --- a/js/index.js +++ b/js/index.js @@ -4,6 +4,7 @@ import { popupOptions } from './map-popup.js'; import { renderCityChart } from './city-chart.js'; import { validateCity, validateTracts } from './data-validation.js'; import { createStageTransition } from './stage-transition.js'; +import { initializeAddressSearch } from './address-search.js'; import { rateBins, unavailableColor, transitionColors, tractStyle, tractFillOpacity } from './map-styles.js'; const status = document.querySelector('#load-status'); @@ -99,7 +100,15 @@ function populateTable(collection) { body.replaceChildren(fragment); } +// plain-language summary for the address status; mirrors the popup and table wording +function tractSummary(properties) { + const p = tractContent(properties); + return `${p.name}. 2020–2022 rate: ${p.peakRate}; 2023–2025 rate: ${p.recentRate} per 10,000 residents per year. Category: ${p.transition}.`; +} + async function initializeMap() { + // set once the map exists; address search still reports tract values without it + let mapSelection = null; try { // presentation uses only validated R exports const [collection, metadata] = await Promise.all([ @@ -115,6 +124,14 @@ async function initializeMap() { .map((label) => `${label}: ${collection.features.filter((f) => f.properties.transition === label).length}`) .join('; ') + '.'; populateTable(collection); + const byGeoid = new Map(collection.features.map((f) => [f.properties.tract_geoid, f])); + initializeAddressSearch(collection, (geoid) => { + const feature = byGeoid.get(geoid); + if (!feature) return null; + const summary = tractSummary(feature.properties); + const shown = mapSelection?.select(geoid); + return shown ? summary : `${summary} Show the visualization to see the tract highlighted on the map.`; + }, () => mapSelection?.clear()); if (!window.L) throw new Error('The map library did not load. The tract table is available; try reloading.'); // context tiles sit beneath the tract polygons; classification stays in the R exports @@ -135,14 +152,32 @@ async function initializeMap() { // animate only this pane; context tiles and map controls remain steady const tractPane = map.createPane('tracts'); tractPane.style.zIndex = 450; + // the highlighted tract follows its open popup, whether opened by a click or an address search + let currentField = 'peak_rate'; + let selectedGeoid = null; + let pendingGeoid = null; + const styleTract = (feature) => tractStyle(feature.properties, currentField, + feature.properties.tract_geoid === selectedGeoid); const dataLayer = L.geoJSON(collection, { pane: 'tracts', - style: (feature) => tractStyle(feature.properties, 'peak_rate'), - onEachFeature: (feature, layer) => layer.bindPopup(() => { - const size = map.getSize(); - Object.assign(layer.getPopup().options, popupOptions(size.x, size.y)); - return tractDetails(feature); - }), + style: styleTract, + onEachFeature: (feature, layer) => { + layer.bindPopup(() => { + const size = map.getSize(); + Object.assign(layer.getPopup().options, popupOptions(size.x, size.y)); + return tractDetails(feature); + }); + layer.on('popupopen', () => { + selectedGeoid = feature.properties.tract_geoid; + layer.setStyle(styleTract(feature)); + layer.bringToFront(); + }); + layer.on('popupclose', () => { + if (selectedGeoid !== feature.properties.tract_geoid) return; + selectedGeoid = null; + layer.setStyle(styleTract(feature)); + }); + }, }); const bounds = dataLayer.getBounds(); if (!bounds.isValid()) throw new Error('The tract layer has no valid bounds.'); @@ -186,7 +221,8 @@ async function initializeMap() { // description.textContent = 'Basemap only'; legend.append(heading, description); } else { - dataLayer.setStyle((feature) => tractStyle(feature.properties, views[id].field)); + currentField = views[id].field; + dataLayer.setStyle(styleTract); if (!map.hasLayer(dataLayer)) dataLayer.addTo(map); updateLegend(id); } @@ -197,14 +233,51 @@ async function initializeMap() { window.matchMedia('(prefers-reduced-motion: reduce)'), ); mapStage = (id, immediate) => transitionToStage(id, immediate || controls.collapsed); + const tractLayer = (geoid) => dataLayer.getLayers().find((layer) => layer.feature.properties.tract_geoid === geoid); + // zoom to the tract and open its popup exactly as a click would + function showTract(geoid) { + const layer = tractLayer(geoid); + if (!layer || controls.collapsed || mapPanel.hidden || !map.hasLayer(dataLayer)) return false; + map.fitBounds(layer.getBounds(), { padding: [24, 24], maxZoom: 15, animate: false }); + layer.openPopup(); + return true; + } + mapSelection = { + select(geoid) { + pendingGeoid = geoid; + if (!showTract(geoid)) return false; + pendingGeoid = null; + return true; + }, + clear() { + pendingGeoid = null; + map.closePopup(); + fitMap(); + }, + }; + const resetMap = document.querySelector('#map-reset'); + resetMap.addEventListener('click', () => { + mapSelection.clear(); + document.querySelector('#stage-status').textContent = 'Map reset to Philadelphia’s full extent.'; + }); + resetMap.disabled = false; + resetMap.hidden = false; controls.onReveal = () => { mapStage(controls.currentId, true); fitMap(); + if (pendingGeoid && showTract(pendingGeoid)) pendingGeoid = null; }; mapStage(controls.currentId, true); fitMap(); window.addEventListener('resize', () => { - if (!mapPanel.hidden) fitMap(); + if (mapPanel.hidden) return; + // keep a searched or clicked tract in view (e.g. when a phone keyboard closes) + const selected = selectedGeoid && tractLayer(selectedGeoid); + if (selected && !controls.collapsed) { + map.invalidateSize(); + map.fitBounds(selected.getBounds(), { padding: [24, 24], maxZoom: 15, animate: false }); + if (selected.isPopupOpen()) fitPopup(selected.getPopup()); + } else fitMap(); }); return `${collection.features.length} tracts`; } catch (error) { diff --git a/js/map-styles.js b/js/map-styles.js index 477b3a8c..f89ba39a 100644 --- a/js/map-styles.js +++ b/js/map-styles.js @@ -27,14 +27,15 @@ function rateColor(value) { return color; } -function tractStyle(properties, view) { +// a selected tract (clicked or found by address) gets a heavy dark outline; fill is unchanged +function tractStyle(properties, view, selected = false) { const fillColor = view === 'transition' ? (transitionColors[properties.transition] || unavailableColor) : rateColor(properties[view]); const unavailable = fillColor === unavailableColor; return { - color: unavailable ? '#333333' : '#FFFFFF', - weight: unavailable ? 1 : 0.6, + color: selected ? '#000000' : (unavailable ? '#333333' : '#FFFFFF'), + weight: selected ? 4 : (unavailable ? 1 : 0.6), dashArray: unavailable ? '3 3' : null, fillOpacity: tractFillOpacity, fillColor,