[GRASS-user] Re: Is it possible to export a Raster to KML
hellik at web.de
Fri Oct 28 06:23:02 EDT 2011
>On Fri, Oct 28, 2011 at 12:01 PM, Helmut Kudrnovsky <[hidden email]> wrote:
>> in my experience overlaying kml (vector and raster) with EPSG:4326 in
>> earth works relatively well in flat areas, in mountain areas there are
>> sometime distortions therefore.
>I can confirm this from my (limited) experience to export data
>to KML. To correct for the geoid heights, you could use the previously
>indicated map and calculate the local ellipsoid-geoid difference
>and vertically shift your vector data with v.transform. Then export
>to KML. For raster, use r.mapcalc to shift.
for some additional information
see http://www.epsg-registry.org/ => retrieve by code:
EPSG: 4326 => GeodeticCRS (geographic 2D) [WGS 84] => 2D
EPSG: 4978 => GeodeticCRS (geocentric) [WGS 84] => 3D
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