Google Earth

[Milo van der Linden]

For wms layers to show up in Google Earth, you generate a groundoverlay. 
The projection of the mapfile or layers itself is not so important, as 
long as the wms service is able to publis in epsg:4326.

This means that in your map metadata you need to have something like:

METADATA
   "wms_title" "My WMS map"
   "wms_srs" "EPSG:4326 EPSG:28992"
   "wms_onlineresource" 
"http://www.myserver.com/cgi-bin/mapserv.exe?map=somemap.map"
  END

where you separate the supported projections with spaces.


When you create a GroundOverlay, Google generates the following kml snippet:

Make sure to add the STYLES= to the end of the request or mapserver will 
generate a wrong result (this is for my 5.0 installation)

<GroundOverlay>
            <name>Terreincontouren</name>
            <color>adffffff</color>
            <Icon>
                
<href>http://www.myserver.com/cgi-bin/mapserv.exe?map=somemap.map&VERSION=1.1.1&REQUEST=GetMap&SRS=EPSG:4326&WIDTH=1024&HEIGHT=1024&LAYERS=aLayer&TRANSPARENT=TRUE&FORMAT=image/png&STYLES=&</href>
                <viewRefreshMode>onStop</viewRefreshMode>
            </Icon>
            <LatLonBox>
                <north>52.43886219516767</north>
                <south>52.19180808173348</south>
                <east>5.137624941169889</east>
                <west>4.652306951338773</west>
            </LatLonBox>
        </GroundOverlay>



It is also possible to show a mapserver legend in Google Earth with the 
following kml snippet:

<ScreenOverlay>
        <visibility>1</visibility>
            <name>Legenda - Percelen</name>
            <Icon>
                
<href>http://www.myserver.com/cgi-bin/mapserv.exe?map=somemap.map&VERSION=1.1.1&REQUEST=GetLegendGraphic&LAYER=aLayer&Format=image/png</href>
            </Icon>
            <overlayXY x="0" y="1" xunits="fraction" yunits="fraction"/>
            <screenXY x="0" y="1" xunits="fraction" yunits="fraction"/>
            <rotationXY x="0.5" y="0.5" xunits="fraction" 
yunits="fraction"/>
            <size x="-1" y="-1" xunits="pixels" yunits="pixels"/>
        </ScreenOverlay>


If you embed these snippets in a kml file, you can see what happens.


Hans Castorp schreef:
>
> Hi to all,
>
>  
>
> It's possible to visualize wms layers from mapserver using Google 
> Earth?? I'm trying to do it but I'm always receiving an error saying 
> that the wms server does not have layer that google earth could 
> process. I think this could be something about my map file 
> configuration. Is there any trick??
>
>  
>
> PD: I'm serving GeoTiff and shape layers.
>
>  
>
> Thanks in advance.
>
>  
>
>  
>
> Hans Castorp
>
>  
>
>
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.5.503 / Virus Database: 269.16.17/1176 - Release Date: 
> 06/12/2007 23:15
>


-- 


	

Milo van der Linden
skype: milovanderlinden <skype:milovanderlinden?add>
mlinden at zeelandnet.nl <mailto:mlinden at zeelandnet.nl>
milovanderlinden at gmail.com <mailto:milovanderlinden at gmail.com>
milo at 3dsite.nl <mailto:milo at 3dsite.nl>
http://www.3dsite.nl

	  	

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