OpenLayers示例代码：WMS GetFeatureInfo（图层）
OpenLayers示例代码：WMS GetFeatureInfo（图层）
<!DOCTYPE html>
<html>
<head>
<title>WMS GetFeatureInfo (Layers)</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>
<table id="info">
<tr>
<td>All features:</td>
<td id="all"></td>
</tr>
<tr>
<td>Hotel features:</td>
<td id="hotel"></td>
</tr>
<tr>
<td>Restaurant features:</td>
<td id="restaurant"></td>
</tr>
</table>
<script>
fetch('https://openlayers.org/en/v4.0.1/examples/data/wmsgetfeatureinfo/osm-restaurant-hotel.xml').then(function(response) {
return response.text();
}).then(function(response) {
// this is the standard way to read the features
var allFeatures = new ol.format.WMSGetFeatureInfo().readFeatures(response);
document.getElementById('all').innerText = allFeatures.length.toString();
// when specifying the 'layers' options, only the features of those
// layers are returned by the format
var hotelFeatures = new ol.format.WMSGetFeatureInfo({
layers: ['hotel']
}).readFeatures(response);
document.getElementById('hotel').innerText = hotelFeatures.length.toString();
var restaurantFeatures = new ol.format.WMSGetFeatureInfo({
layers: ['restaurant']
}).readFeatures(response);
document.getElementById('restaurant').innerText = restaurantFeatures.length.toString();
});
</script>
</body>
</html>
说明：
OpenLayers示例代码：WMS GetFeatureInfo（图层）
