OpenLayers示例代码：WMS 512x256瓦片
OpenLayers示例代码：WMS 512x256瓦片
<!DOCTYPE html>
<html>
<head>
<title>WMS 512x256 Tiles</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 projExtent = ol.proj.get('EPSG:3857').getExtent();
var startResolution = ol.extent.getWidth(projExtent) / 256;
var resolutions = new Array(22);
for (var i = 0, ii = resolutions.length; i < ii; ++i) {
resolutions[i] = startResolution / Math.pow(2, i);
}
var tileGrid = new ol.tilegrid.TileGrid({
extent: [-13884991, 2870341, -7455066, 6338219],
resolutions: resolutions,
tileSize: [512, 256]
});
var layers = [
new ol.layer.Tile({
source: new ol.source.OSM()
}),
new ol.layer.Tile({
source: new ol.source.TileWMS({
url: 'https://ahocevar.com/geoserver/wms',
params: {'LAYERS': 'topp:states', 'TILED': true},
serverType: 'geoserver',
tileGrid: tileGrid
})
})
];
var map = new ol.Map({
layers: layers,
target: 'map',
view: new ol.View({
center: [-10997148, 4569099],
zoom: 4
})
});
</script>
</body>
</html>
说明：
OpenLayers示例代码：WMS 512x256瓦片
