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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> | |
| var file = (location.search.split('&')[0].split('=')[1] || 'places') + '.geojson'; | |
| var line_file = (location.search.split('&')[0].split('=')[1] || 'lines') + '.geojson'; | |
| mapboxgl.accessToken = 'pk.eyJ1IjoiaW5nZW5pZXJvYXJpZWwiLCJhIjoibXhDZ3pIMCJ9.qTmPYCbnUKtaNFkvKKysAQ'; | |
| var map = new mapboxgl.Map({ | |
| container: 'map', | |
| style: 'mapbox://styles/mapbox/dark-v9', | |
| center: [38, 11], | |
| zoom: 6 | |
| }); | |
| map.on('load', function() { | |
| //Add a geojson point source. | |
| //Heatmap layers also work with a vector tile source. | |
| map.addSource('jda', { | |
| "type": "geojson", | |
| "data": file | |
| }); | |
| map.addSource('power', { | |
| "type": "geojson", | |
| "data": line_file | |
| }); | |
| map.addLayer({ | |
| "id": "jda-heat", | |
| "type": "heatmap", | |
| "source": "jda", | |
| "maxzoom": 15, | |
| "paint": { | |
| //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. | |
| //.RdYlGn .q0-6{fill:rgb(215,48,39)} .RdYlGn .q1-6{fill:rgb(252,141,89)} .RdYlGn .q2-6{fill:rgb(254,224,139)} .RdYlGn .q3-6{fill:rgb(217,239,139)} .RdYlGn .q4-6{fill:rgb(145,207,96)} .RdYlGn .q5-6{fill:rgb(26,152,80)} | |
| // ['rgb(254,229,217)','rgb(252,187,161)','rgb(252,146,114)','rgb(251,106,74)','rgb(222,45,38)','rgb(165,15,21)'] | |
| "heatmap-color": { | |
| "stops": [ | |
| [0, "rgba(254,229,217,0.0)"], | |
| [0.2, "rgba(252,187,161, 0.2)"], | |
| [0.4, "rgba(252,146,114, 0.5)"], | |
| [0.6, "rgba(251,106,74, 0.7)"], | |
| [0.8, "rgba(222,45,38,1)"], | |
| [1, "rgba(165,15,21,1)"] | |
| ] | |
| }, | |
| //Adjust the heatmap radius by zoom level | |
| "heatmap-radius": { | |
| "stops": [ | |
| [0, 1], | |
| [6, 1.5], | |
| [7, 3], | |
| [8, 4], | |
| [9, 5], | |
| [10, 10], | |
| [12, 20], | |
| [20, 30] | |
| ] | |
| }, | |
| //Transition from heatmap to circle layer by zoom level | |
| "heatmap-opacity": { | |
| "default": 1, | |
| "stops": [ | |
| [12, 1], | |
| [13, 1], | |
| [19, 0.5], | |
| [20, 0.5], | |
| [24, 0] | |
| ] | |
| }, | |
| } | |
| }, 'waterway-label'); | |
| map.addLayer({ | |
| "id": "jda-point", | |
| "type": "symbol", | |
| "source": "jda", | |
| "minzoom": 12, | |
| "layout": { | |
| "text-field": "{LO_NAME}", | |
| "text-size": 24 | |
| }, | |
| "paint": { | |
| "text-color": "rgba(250,250,250,0.8)", | |
| "text-halo-color": "rgba(250, 250, 250, 1)" | |
| } | |
| }, 'waterway-label'); | |
| map.addLayer({ | |
| "id": "power-line", | |
| "type": "line", | |
| "source": "power", | |
| "layout": { | |
| "line-join": "round", | |
| "line-cap": "round" | |
| }, | |
| "paint": { | |
| "line-color": "rgba(255,255,153, 1)", | |
| "line-width": 3 | |
| } | |
| }, 'waterway-label'); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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