[osg-users] [vpb] altitude in flat terrain

[Robert Osfield]

Hi Vijeesh,

osgdem will assume the coordinate systems of the input if your don't
provide any guidance on the output format.  I you run 'osgdem -h' in
the console the command line options will be listed, these include:


--geocentric      Build a database in geocentric (i.e. whole earth) database.

and:

 --wkt <WKT string>
                   Set the coordinates system of source imagery, DEM or
                   destination database in WellKnownText form.
 --wkt-file <WKT file>
                   Set the coordinates system of source imagery, DEM or
                   destination database by as file containing WellKownText
                   definition.

In the case of the --wkt usage, you'll want to place this before the
-o, but after the -d and -t entries otherwise you'll override their
coordinate systems.  The WellKnownText format is passed onto the GDAL
to do the reprojection, and it's syntax is written up on GDAL website.

Robert