OpenLayers示例代码：TopoJSON
OpenLayers示例代码：TopoJSON
<!DOCTYPE html>
<html>
<head>
<title>TopoJSON</title>
<link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script>
</head>
<body>
<div id="map" class="map"></div>
<script>
var raster = new ol.layer.Tile({
source: new ol.source.TileJSON({
url: 'https://api.tiles.mapbox.com/v3/mapbox.world-dark.json?secure'
})
});
var style = new ol.style.Style({
fill: new ol.style.Fill({
color: 'rgba(255, 255, 255, 0.6)'
}),
stroke: new ol.style.Stroke({
color: '#319FD3',
width: 1
})
});
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
url: 'https://openlayers.org/en/v4.0.1/examples/data/topojson/world-110m.json',
format: new ol.format.TopoJSON(),
overlaps: false
}),
style: function(feature) {
// don't want to render the full world polygon, which repeats all countries
return feature.getId() !== undefined ? style : null;
}
});
var map = new ol.Map({
layers: [raster, vector],
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 1
})
});
</script>
</body>
</html>
说明：
OpenLayers示例代码：TopoJSON
