99 lines
3.1 KiB
HTML
99 lines
3.1 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Layer with aggregation cluster | CARTO</title>
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<meta name="viewport" content="initial-scale=1.0">
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<meta charset="utf-8">
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<link href="https://fonts.googleapis.com/css?family=Montserrat:400,600,700|Open+Sans:300,400,600" rel="stylesheet">
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<!-- Include Google Maps -->
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<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDpVNTQI60ossApFzZ3dwSMZ1LcxOTY-rI&v=3.35"></script>
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<!-- Include CARTO.js -->
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<script src="../../../dist/public/carto.js"></script>
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<link href="../style.css" rel="stylesheet">
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</head>
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<body>
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<div id="map">
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</div>
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<!-- Description -->
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<aside class="toolbox">
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<div class="box">
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<header>
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<h1>Server tile aggregation cluster</h1>
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<button class="github-logo js-source-link"></button>
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</header>
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<section>
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<p class="description open-sans">This map has smart backend aggregation cluster applied. See source code for details.</p>
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</section>
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<footer class="js-footer"></footer>
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</div>
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</aside>
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<script>
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const map = new google.maps.Map(document.getElementById('map'), {
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center: { lat: 38.479395, lng: -102.480469 },
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zoom: 3,
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fullscreenControl: false,
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gestureHandling: 'cooperative'
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});
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// Hide the map labels and geometry strokes
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map.set('styles', [{
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elementType: 'labels',
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stylers: [{ visibility: 'off' }]
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}, {
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elementType: 'geometry.stroke',
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stylers: [{ visibility: 'off' }]
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}]);
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const client = new carto.Client({
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apiKey: 'default_public',
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username: 'cartojs-test'
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});
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// Define source using value 1 as count to count the number
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// of points within the aggregation that will be created
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const source = new carto.source.SQL(`
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SELECT *, 1 as count
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FROM stormevents_locations_2014
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`);
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// Aggregation option summing al values of field count
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const aggregation = new carto.layer.Aggregation({
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threshold: 1,
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resolution: 32,
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placement: carto.layer.Aggregation.placement.SAMPLE,
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columns: {
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total_agg: {
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aggregateFunction: carto.layer.Aggregation.operation.SUM,
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aggregatedColumn: "count"
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}
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}
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});
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const style = new carto.style.CartoCSS(`
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#layer {
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marker-fill: red;
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marker-width: ramp([total_agg], 6,25 , quantiles);
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}
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#layer::labels {
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text-name: [total_agg];
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text-face-name: 'DejaVu Sans Book';
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text-size: 10;
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text-fill: #FFFFFF;
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text-label-position-tolerance: 0;
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text-halo-radius: 1;
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text-halo-fill: #6F808D;
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text-allow-overlap: true;
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text-placement: point;
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text-placement-type: dummy;
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}
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`);
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const layer = new carto.layer.Layer(source, style, { aggregation });
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client.addLayer(layer);
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map.overlayMapTypes.push(client.getGoogleMapsMapType(map));
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</script>
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</body>
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</html>
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