[GIS] How to add WMS legend in leaflet from Geoserver

geoserverleafletlegendsymbologywms

Can anyone explain me how I can include a legend within the layer control for any individual WMS layers in leaflet?

The wms service works fine. I just want assign the symbol label to each layer of the group.

This is an example of my app:

My code is similar to the leaflet groupedlayercontrol plugin: https://github.com/ismyrnow/Leaflet.groupedlayercontrol

Best Answer

There may be other options at your disposal, however I will mention two options that you can explore to add a legend to your WMS on Geoserver.

You could always utilize the request GetMap which will allow you to make modification/changes to your layout properties. You can read more on the Geoserver webapage here

Another option I came across is github user: kartoza webpage were he provides a simple WMS legend plugin to use.

This is a simple plugin for leaflet that will display a WMS GetLegendGraphic request result in a legend. At the moment the plugin is really, really simple in that is actually will display any image URI you pass it on initialisation. However that is enough to create a nice looking legend on your map like this:

Related Solutions

[GIS] How to add individual layer of WMS group layer to ArcMap

You need to clear the WMS Service Group Layer before adding the single WMSMapLayer.

wmsMapLayer.Clear();
wmsMapLayer.InsertLayer(newLayer, 0);

Note that this will remove all group/map layers from the WMS Service Group Layer, so if you're adding more than one, it might be advisable to not call wmsMapLayer.Clear() in the body of your loop. I haven't tested as I'm only adding a single layer, but perhaps instead, loop through groupDesc.LayerDescriptionCount and grab all the layerDesc objects that match your criteria, then Clear() and add the selected WMS layers back in.

[GIS] How to call Legend end points of multiple layers published from Geoserver

According to this blog, the GetLegendGraphic call will render a legend for Layer Groups. However, I wasn't able to confirm that in Geoserver documentation--perhaps because it's implicit that it should work? And unfortunately our Geoserver instance predates the blog (11.02.2013) so I wasn't able to test it against one of our layer groups, either. :/

If you're loading your layers individually for toggling display on/off, you might try making a layer group with a few layers just to see if you can call GetLegendGraphic on the group layer. Then if it works, just create a group layer with all of your layers in it for the sake of grabbing a huge legend graphic.

Best Answer

Related Solutions

[GIS] How to add individual layer of WMS group layer to ArcMap

[GIS] How to call Legend end points of multiple layers published from Geoserver

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