Created
October 20, 2017 16:21
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heatmap
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset='utf-8' /> | |
<title></title> | |
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-gl.js'></script> | |
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-gl.css' rel='stylesheet' /> | |
<style> | |
body { margin:0; padding:0; } | |
#map { position:absolute; top:0; bottom:0; width:100%; } | |
</style> | |
</head> | |
<body> | |
<div id='map'></div> | |
<script> | |
mapboxgl.accessToken = '<your access token here>'; | |
var map = new mapboxgl.Map({ | |
container: 'map', | |
style: 'mapbox://styles/mapbox/dark-v9', | |
center: [-120, 50], | |
zoom: 2 | |
}); | |
map.on('load', function() { | |
//Add a geojson point source. | |
//Heatmap layers also work with a vector tile source. | |
map.addSource('earthquakes', { | |
"type": "geojson", | |
"data": "https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson" | |
}); | |
map.addLayer({ | |
"id": "earthquakes-heat", | |
"type": "heatmap", | |
"source": "earthquakes", | |
"maxzoom": 9, | |
"paint": { | |
//Increase the heatmap weight based on frequency and property magnitude | |
"heatmap-weight": { | |
"property": "mag", | |
"type": "exponential", | |
"stops": [ | |
[0, 0], | |
[6, 1] | |
] | |
}, | |
//Increase the heatmap color weight weight by zoom level | |
//heatmap-ntensity is a multiplier on top of heatmap-weight | |
"heatmap-intensity": { | |
"stops": [ | |
[0, 1], | |
[9, 3] | |
] | |
}, | |
//Color ramp for heatmap. Domain is 0 (low) to 1 (high). | |
//Begin color ramp at 0-stop with a 0-transparancy color | |
//to create a blur-like effect. | |
"heatmap-color": { | |
"stops": [ | |
[0, "rgba(33,102,172,0)"], | |
[0.2, "rgb(103,169,207)"], | |
[0.4, "rgb(209,229,240)"], | |
[0.6, "rgb(253,219,199)"], | |
[0.8, "rgb(239,138,98)"], | |
[1, "rgb(178,24,43)"] | |
] | |
}, | |
//Adjust the heatmap radius by zoom level | |
"heatmap-radius": { | |
"stops": [ | |
[0, 2], | |
[9, 20] | |
] | |
}, | |
//Transition from heatmap to circle layer by zoom level | |
"heatmap-opacity": { | |
"default": 1, | |
"stops": [ | |
[7, 1], | |
[9, 0] | |
] | |
}, | |
} | |
}, 'waterway-label'); | |
map.addLayer({ | |
"id": "earthquakes-point", | |
"type": "circle", | |
"source": "earthquakes", | |
"minzoom": 7, | |
"paint": { | |
//Size circle raidus by earthquake magnitude and zoom level | |
"circle-radius": { | |
"property": "mag", | |
"type": "exponential", | |
"stops": [ | |
[{ zoom: 7, value: 1 }, 1], | |
[{ zoom: 7, value: 6 }, 4], | |
[{ zoom: 16, value: 1 }, 5], | |
[{ zoom: 16, value: 6 }, 50], | |
] | |
}, | |
//Color circle by earthquake magnitude | |
"circle-color": { | |
"property": "mag", | |
"type": "exponential", | |
"stops": [ | |
[1, "rgba(33,102,172,0)"], | |
[2, "rgb(103,169,207)"], | |
[3, "rgb(209,229,240)"], | |
[4, "rgb(253,219,199)"], | |
[5, "rgb(239,138,98)"], | |
[6, "rgb(178,24,43)"] | |
] | |
}, | |
"circle-stroke-color": "white", | |
"circle-stroke-width": 1, | |
//Transition from heatmap to circle layer by zoom level | |
"circle-opacity": { | |
"stops": [ | |
[7, 0], | |
[8, 1] | |
] | |
} | |
} | |
}, 'waterway-label'); | |
}); | |
</script> | |
</body> | |
</html> |
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