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<html>
<head>
<!-- FONT -->
<link
href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600&display=swap"
rel="stylesheet"
/>
<script src="https://unpkg.com/deck.gl@^8.8.0/dist.min.js"></script>
<script src="https://unpkg.com/@deck.gl/carto@^8.8.0/dist.min.js"></script>
<script src="https://unpkg.com/maplibre-gl@2.1.9/dist/maplibre-gl.js"></script>
<link href="https://unpkg.com/maplibre-gl@2.1.9/dist/maplibre-gl.css" rel="stylesheet" />
</head>
<body style="margin: 0; padding: 0; overflow: hidden; font-family: 'Open Sans', sans-serif">
<div id="map" style="width: 100vw; height: 100vh"></div>
</body>
<script type="text/javascript">
const BANDS = [
{ threshold: [0.1, 1], color: [255, 255, 178] },
{ threshold: [1, 10], color: [254, 204, 92] },
{ threshold: [10, 50], color: [253, 141, 60] },
{ threshold: [50, 100], color: [240, 59, 32] },
{ threshold: [100, 1000], color: [189, 0, 38] },
{ threshold: [1000, 10000], color: [159, 0, 80] }
];
const MS_PER_WEEK = 1000 * 60 * 60 * 24 * 7;
const WEEK = 50;
function getTooltip(info) {
if (!info.object) {
return null;
}
const date = new Date(Date.UTC(2020, 0, 20) + WEEK * MS_PER_WEEK);
const { threshold } = info.object.contour;
let str;
if (threshold[1] === 1) {
str = '<1 new case';
} else if (threshold[0] === 2000) {
str = '>2,000 new cases';
} else {
str = `${threshold[0]}-${threshold[1]} new cases`;
}
return `\
Week of ${date.toJSON().slice(0, 10)}
${str} per 100K residents`;
};
async function initialize() {
deck.carto.setDefaultCredentials({
username: 'public',
apiKey: 'default_public',
apiVersion: deck.carto.API_VERSIONS.V2,
});
// Fetch Data from CARTO
// Notice that you can use any Deck.gl layer with CARTO datasets getting GeoJSON data from CARTO's API. This method is recommended for complex layers with datasets below 50Mb
const url = 'https://public.carto.com/api/v2/sql?q=SELECT the_geom, casesbyweek, population FROM eeuu_covid_by_county&format=geojson';
const geojsonData = await fetch(url).then(response => response.json());
// Create Deck.GL map
const deckgl = new deck.DeckGL({
container: 'map',
map: maplibregl,
mapStyle: deck.carto.BASEMAP.DARK_MATTER,
initialViewState: {
longitude: -100,
latitude: 39,
zoom: 3,
maxZoom: 10
},
controller: true,
layers: [
new deck.ContourLayer({
id: 'contour-layer',
data: geojsonData.features,
getPosition: d => d.geometry.coordinates,
getWeight: d => ((d.properties.casesbyweek[WEEK] || 0) / d.properties.population) * 1e5,
pickable: true,
aggregation: 'MAX',
contours: BANDS,
cellSize: 90000
})
],
getTooltip
});
}
initialize();
</script>
</html>
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