How to get the legends from geoserver

Question

I am using geoserver 2.5.5. I have to get the legends of each category from different link. Now geoserver gives whole legend as a PNG image format using this link http://localhost:8080/geoserver/wms?REQUEST=GetLegendGraphic&VERSION=1.0.0&FORMAT=image/png&WIDTH=20&HEIGHT=20&LAYER=topp:states

I need to have a link which gives each category of legend as a separate image like I need only <2M category in one link like this

Answer 1

You can specify the optional RULE parameter in your request to specify the rule you want the legend for (see documentation)

You must have a Rule with a Name set, so if you modify the default population style:

 <Rule>
      <Name>top</Name>
      <Title>&gt; 4M</Title>

      <!-- like a linesymbolizer but with a fill too -->

You can make a request like:

http://localhost:8080/geoserver/wms?REQUEST=GetLegendGraphic&VERSION=1.0.0&FORMAT=image/png&WIDTH=20&HEIGHT=20&LAYER=topp:states&RULE=top