How to get attribute info of wms layer published in geoserver in a popup via. Leaflet
Question
I have published a feature in geoserver which I am successfully accessing by leaflet with its basemap. Now I need to fetch the attribute information of feature onclick in a popup.
I used example ( https://gist.github.com/rclark/6908938 ) as it is, but didn't succeed, on click it doesn't show anything, neither any error in console. I replaced "map" with "mapid" ie mapid for me. I m not understanding whats happening kindly help me with this. Thanks.....
my html file is - test.html
<html>
<head>
<title>Leaflet</title>
<link rel="stylesheet" href="http://unpkg.com/leaflet@1.3.1/dist/leaflet.css" />
<script src="http://unpkg.com/leaflet@1.3.1/dist/leaflet.js"></script>
</head>
<body>
<div style="width:100%; height:100%" id="map"></div>
<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
<script src="BetterWMS.js"></script>
<script type='text/javascript'>
var map = new L.Map('map', {center: new L.LatLng(30.176166666666667,79.14880555555557), zoom: 8});
var osm = new L.TileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png');
map.addLayer(osm);
var Forest_Data = L.tileLayer.wms('http://localhost:8080/geoserver/cite/wms', {
format: 'image/png',layers: 'cite:Forest_Data',transparent: 'true'
}).addTo(map);
</script>
</body>
</html>
and "BetterWMS.js" file is -
L.TileLayer.BetterWMS = L.TileLayer.WMS.extend({
onAdd: function (mapid) {
// Triggered when the layer is added to a map.
// Register a click listener, then do all the upstream WMS things
L.TileLayer.WMS.prototype.onAdd.call(this, mapid);
map.on('click', this.getFeatureInfo, this);
},
onRemove: function (mapid) {
// Triggered when the layer is removed from a map.
// Unregister a click listener, then do all the upstream WMS things
L.TileLayer.WMS.prototype.onRemove.call(this, mapid);
map.off('click', this.getFeatureInfo, this);
},
getFeatureInfo: function (evt) {
// Make an AJAX request to the server and hope for the best
var url = this.getFeatureInfoUrl(evt.latlng),
showResults = L.Util.bind(this.showGetFeatureInfo, this);
$.ajax({
url: url,
success: function (data, status, xhr) {
var err = typeof data === 'string' ? null : data;
showResults(err, evt.latlng, data);
},
error: function (xhr, status, error) {
showResults(error);
}
});
},
getFeatureInfoUrl: function (latlng) {
// Construct a GetFeatureInfo request URL given a point
var point = this._map.latLngToContainerPoint(latlng, this._map.getZoom()),
size = this._map.getSize(),
params = {
request: 'GetFeatureInfo',
service: 'WMS',
srs: 'EPSG:4326',
styles: this.wmsParams.styles,
transparent: this.wmsParams.transparent,
version: this.wmsParams.version,
format: this.wmsParams.format,
bbox: this._map.getBounds().toBBoxString(),
height: size.y,
width: size.x,
layers: this.wmsParams.layers,
query_layers: this.wmsParams.layers,
info_format: 'text/html'
};
params[params.version === '1.3.0' ? 'i' : 'x'] = point.x;
params[params.version === '1.3.0' ? 'j' : 'y'] = point.y;
return this._url + L.Util.getParamString(params, this._url, true);
},
showGetFeatureInfo: function (err, latlng, content) {
if (err) { console.log(err); return; } // do nothing if there's an error
// Otherwise show the content in a popup, or something.
L.popup({ maxWidth: 800})
.setLatLng(latlng)
.setContent(content)
.openOn(this._map);
}
});
L.tileLayer.betterWms = function (url, options) {
return new L.TileLayer.BetterWMS(url, options);
};
I am expecting a simple popup on clicking WMS layer with attribute information of the feature.
2 answers
solution1
1 2019-04-24 07:11:04
You defined your Forest_Data as a default WMS object :
var Forest_Data = L.tileLayer.wms (...)
You need to use the new object you defined instead. See in your link's example :
L.tileLayer.betterWms(...)
solution2
0 ACCPTED
上面的代码是正确的，只需要一个替换，而不是-var Forest_Data = L.tileLayer.wms，它将是-var Forest_Data = L.tileLayer.betterWMS
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