Hi, to use SLD with WMS layer you can do: myLayerWMS.proxyURL = "http://mySite.com/proxy.php"; myLayerWMS.url = "http://myGisServer/services/myServce/MapServer/WMSServer?SLD=url_to_xml"; in proxy.php update the url and replace "STYLES=" with "STYLES=myStyleName" myStyleName should be the same in xml file. in the final url you should have something like: http://myGisServer/services/myService/MapServer/WMSServer?BBOX=283800.83413922496%2C6313182.926376634%2C762602.3793175454%2C6753460.209299228&WIDTH=783&TRANSPARENT=TRUE&CRS=EPSG%3A102100&LAYERS=0&REQUEST=GetMap&FORMAT=image%2Fpng&HEIGHT=720&SERVICE=WMS&VERSION=1.3.0&STYLES=myStyleName&SLD=http://url_to_xml/myfile.xml
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