Basic mouse interactivity with Leaflet
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forked from enjalot's block: WWSD #2-b: Leaflet Choropleth
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November 4, 2016 03:09
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Leaflet styling and interaction
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| license: mit |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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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.stamen.com/toner/{z}/{x}/{y}.png', { | |
| attribution: 'Map tiles by <a href="http://stamen.com">Stamen Design</a>, under <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. Data © <a href="http://openstreetmap.org">OpenStreetMap</a>, under <a href="http://www.openstreetmap.org/copyright">ODbL</a>' | |
| }).addTo(map); | |
| var url = "https://stamen.github.io/spatial-dataviz-for-data-scientists/data/world/ne_50m_admin_0_countries.geojson" | |
| d3.json(url, function(err, data) { | |
| function highlightFeature(e) { | |
| var layer = e.target; | |
| layer.setStyle({ | |
| weight: 5, | |
| color: '#666', | |
| 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: 'lightgreen', | |
| fillOpacity:0.4, | |
| color: 'darkgreen', | |
| weight: 2, | |
| } | |
| }, | |
| onEachFeature: onEachFeature | |
| }).addTo(map) | |
| }) | |
| </script> | |
| </body> |
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