[GRASS-dev] adding units and vertical datum metadata to raster maps

Paul Kelly paul-grass at stjohnspoint.co.uk
Mon May 21 16:28:43 EDT 2007

On Mon, 21 May 2007, Michael Barton wrote:

> Any chance that vertical units will show up in g.proj? That's where your

Vertical units apply only to a particular map in a particular mapset, not 
to all the mapsets in a location like horizontal units (i.e. the 
location's co-ordinate system do). And it's perfectly valid to have 
different elevation maps in different units in the same mapset and to 
have to convert between them (e.g. ellipsoidal height from GPS and geoid 
height above sea level). I can't really see how the location co-ordinate 
system definition could easily be extended to support units for the 3rd 
dimension :/


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