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110 lines
3.0 KiB
110 lines
3.0 KiB
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<html>
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<style>
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#map, html, body {
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width: 100%; height: 100%; padding: 0; margin: 0;
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}
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#title {
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position: absolute;
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top: 100px;
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left: 50px;
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color: white;
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font-size: 27px;
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font-family: Helvetica, sans-serif;
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}
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</style>
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<body>
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<div id="map"></div>
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<div id="title">Average temperature collected by Britain's Royal Navy (1913-1925)</div>
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.3.4/leaflet.css" />
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<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.3.4/leaflet.js"></script>
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<script src="../dist/torque.full.uncompressed.js"></script>
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<script>
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// define the torque layer style using cartocss
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// this creates a kind of density map
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//color scale from http://colorbrewer2.org/
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var CARTOCSS = [
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'Map {',
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'-torque-time-attribute: "date";',
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'-torque-aggregation-function: "avg(temp::float)";',
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'-torque-frame-count: 1;',
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'-torque-animation-duration: 15;',
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'-torque-resolution: 16',
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'}',
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'#layer {',
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' marker-width: 8;',
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' marker-fill-opacity: 1.0;',
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' marker-fill: #fff5eb; ',
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' marker-type: rectangle;',
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' [value > 1] { marker-fill: #fee6ce; }',
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' [value > 2] { marker-fill: #fdd0a2; }',
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' [value > 4] { marker-fill: #fdae6b; }',
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' [value > 10] { marker-fill: #fd8d3c; }',
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' [value > 15] { marker-fill: #f16913; }',
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' [value > 20] { marker-fill: #d94801; }',
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' [value > 25] { marker-fill: #8c2d04; }',
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'}'
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].join('\n');
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var map = new L.Map('map', {
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zoomControl: true,
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center: [40, 0],
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zoom: 3
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});
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L.tileLayer('https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}.png', {
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attribution: 'CartoDB'
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}).addTo(map, true);
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var torqueLayer = new L.TorqueLayer({
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user : 'viz2',
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table : 'ow',
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cartocss: CARTOCSS,
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tiler_protocol: 'https',
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tiler_port: 443,
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zIndex: 10
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});
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torqueLayer.addTo(map);
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map.on('click', function(e) {
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var p = e.containerPoint
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var value = torqueLayer.getValueForPos(p.x, p.y);
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if (value !== null) {
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map.openPopup('average temperature: ' + value.value + "C", e.latlng);
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}
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});
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// show small rectable and change cursor on hover
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var hover = null;
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map.on('mousemove', function(e) {
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var p = e.containerPoint
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var value = torqueLayer.getValueForPos(p.x, p.y);
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// remove previous hover box
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if (hover) {
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map.removeLayer(hover);
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hover = null;
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}
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if (value !== null) {
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hover = L.rectangle(value.bbox, {
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color: '#000',
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weight: 1
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}).addTo(map);
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map._container.style.cursor = 'pointer';
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} else {
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map._container.style.cursor = 'auto';
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}
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});
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</script>
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</body>
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</html>
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