ASSUMING your source data is geographic (e.g. WGS84) then you have a
Plate Carre projection and the conversion is simply: X=Lon, Y=Lat. If it
is not geographic, then you will have to use a library like PROJ.4 to
reproject it.
The elevation source data is raw DTED format which uses WGS84.
So if I want to reposition my airplane over the terrain, do I use lat/lon
coordinates to do that such as:
airplaneXform->setPosition(osg::Vec3(-113.0, 33.0, altitude))
?
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