[Openstreetmap] GPS point submission format

[Petter Reinholdtsen]

[Petter Reinholdtsen]
> didn't seem to support files with 3D coordinates, only 2D
> coordinates, so we would loose information or loose the ability to
> visualize the information

I guess I forgot to mention why I believe it is important to store the
3D information.  I recently saw a few projects using a GPS to create a
3D model of some surface.  Check out
<URL:http://www.metu.edu.tr/home/wwwkerk/kerk1/05remote/gpss/3d/> and
<URL:http://www.gpsdrawing.com/models/whhmodel.htm>.  See
<URL:http://www.gpsdrawing.com/gpsograph.htm> for info on the tool
producing the last drawings.

I believe it would be nice if we the map we produced included height
info, making it possible to calculate how steep the hills are, or make
3D models the landscape.

Unrelated to this, it would be useful if the format used would include
the raw satellite information, with enough information to make it
possible to post-process the GPS data using differential GPS data to
increase the accuracy of the measurements.  Check out
<URL:http://www.wsrcc.com/wolfgang/gps/dgps-ip.html> for more info on
this.  It would be able to remove most of the error introduced by the
selective availability, and might even be able to reduce the error
introduced by the disturbances from the atmosphere as well.

Anyone know if GPX is capable of storing this information?