Basic mouse interactivity with Leaflet
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forked from enjalot's block: WWSD #1: Leaflet starter
forked from enjalot's block: WWSD #1-a: Leaflet Rivers
forked from enjalot's block: WWSD #2-a: Leaflet Choropleth
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June 18, 2016 21:29
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WWSD #2-b: Leaflet Choropleth
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.css" /> | |
| <script src="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| #map { | |
| height: 100%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map"></div> | |
| <script> | |
| var map = L.map('map').setView([30, 0], 2); | |
| L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', { | |
| attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors' | |
| }).addTo(map); | |
| var url = "http://enjalot.github.io/wwsd/data/world/ne_50m_admin_0_countries.geojson" | |
| d3.json(url, function(err, data) { | |
| var maxPop = d3.max(data.features, function(d) { return d.properties.pop_est }) | |
| var color = d3.scale.threshold() | |
| .domain([0, 1000000, 100000000, 1000000000]) | |
| .range(["#ffffcc","#c2e699","#78c679","#31a354","#006837"]) | |
| function highlightFeature(e) { | |
| var layer = e.target; | |
| layer.setStyle({ | |
| weight: 5, | |
| color: '#666', | |
| dashArray: '', | |
| fillOpacity: 0.7 | |
| }); | |
| } | |
| function resetHighlight(e) { | |
| geojsonLayer.resetStyle(e.target); | |
| } | |
| function zoomToFeature(e) { | |
| map.fitBounds(e.target.getBounds()); | |
| } | |
| function onEachFeature(feature, layer) { | |
| layer.on({ | |
| mouseover: highlightFeature, | |
| mouseout: resetHighlight, | |
| click: zoomToFeature | |
| }); | |
| } | |
| var geojsonLayer = L.geoJson(data, { | |
| style: function(feature) { | |
| return { | |
| fillColor: color(feature.properties.pop_est), | |
| fillOpacity:0.4, | |
| weight: 1, | |
| } | |
| }, | |
| onEachFeature: onEachFeature | |
| }).addTo(map) | |
| }) | |
| </script> | |
| </body> |
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