Eric Strabala a écrit :
> I'm using DefaultGeographicCRS.WGS84_3D. In the says in the javadocs
> "height above the ellipsoid in metres" Is 0 meters MSL?
If "MSL" is "Mean Sea Level", no this is a different thing. 0 meters above the
ellipsoid may be many meters above or below the Mean Sea Level.
If you need a heigh above the Mean Sea Level, you can get something close by
using "Height above the geoid" instead (note the term "geoid" in place of
"ellipsoid"). The modules/unsupported/referencing3D module handles the
transformations from "height above the ellipsoid" to "height above the geoid".
However in its current state, you have to instantiate the MathTransform object
directly - it is not yet done automatically by
DefaultCoordinateOperationFactory.
Martin
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