Table of contents
If you save the WMS layer you created via the GUI, you can save that to a separate .kml
file. IF you save as a .kmz
, that is simply a zipped .kml
. You can now edit the .kml
in an ASCII edit such as notepad, wordpad or textpad, to see what the syntax is for showing a WMS layer in Google Earth.
Once saved, you will see that kml uses a so-called GroundOverlay
element. The GroundOverlay is en element that positions any image on the globe by describing its bounding boxes. The image can be a local image, one that you saved to your local harddisk, or a image on the web. For WMS, the image is actually generated on the fly, using a a very long url. We explain the construction of this url on a separate wms primer. Note that you need to replace all &
sumbols in the url with the html encoding for aht &
.
<?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom"> <GroundOverlay> <name>vaklodingenKB121_2120 wms</name> <description></description> <Icon> <href>http://opendap.deltares.nl/thredds/wms/opendap/rijkswaterstaat/vaklodingen/vaklodingenKB121_2120.nc?service=WMS&version=1.3.0&request=GetMap&bbox=4.567220799999999,52.9343465,4.7177535,53.047411499999995&layers=z&format=image/png&crs=EPSG%3A4326&width=800&height=600&styles=boxfill/ferret&COLORSCALERANGE=-500,500&TRANSPARENT=TRUE</href> </Icon> <LatLonBox> <north>52.9343</north> <south>53.0474</south> <east>4.7178</east> <west>4.5672</west> </LatLonBox> </GroundOverlay> </kml> |