帮我写一个openlayers的WMS属性查询
时间: 2023-06-12 08:01:54 浏览: 203
当然,我会努力帮你找到答案。以下是openlayers的WMS属性查询的基本方法:
1. 创建图层:
```javascript
var layer = new ol.layer.Tile({
source: new ol.source.TileWMS({
url: 'http://your-wms-server.com/wms',
params: {
'LAYERS': 'your_layer_name',
'VERSION': '1.1.1',
'TILED': false,
},
serverType: 'mapserver',
}),
});
map.addLayer(layer);
```
2. 添加鼠标事件监听器:
```javascript
map.on('singleclick', function (evt) {
//点击地图时执行此函数
var viewResolution = map.getView().getResolution();
var url = layer.getSource().getGetFeatureInfoUrl(
evt.coordinate,
viewResolution,
'EPSG:3857',
{INFO_FORMAT: 'text/html'}
);
if (url) {
//请求URL返回HTML
fetch(url)
.then(function (response) {
return response.text();
})
.then(function (html) {
//在查询窗口中显示HTML内容
showFeatureInfo(evt.coordinate, html);
});
}
});
function showFeatureInfo(coordinate, html) {
var popup = new ol.Overlay({
element: document.getElementById('popup'),
positioning: 'bottom-center',
stopEvent: false,
offset: [0, -50],
});
map.addOverlay(popup);
//在弹出窗口中显示HTML内容
popup.setPosition(coordinate);
document.getElementById('popup-content').innerHTML = html;
}
```
3. 在HTML页面中添加查询窗口:
```html
<div id="popup">
<div id="popup-content"></div>
<a href="#" id="popup-closer" class="ol-popup-closer"></a>
</div>
```
以上是openlayers的WMS属性查询的基本方法,你可以根据自己的需求对代码进行修改。希望对你有所帮助!
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