[GRASSLIST:2176] Projection questions

Rich Shepard rshepard at appl-ecosys.com
Fri Jul 27 12:32:52 EDT 2001

  I have a bunch of questions about the storage of information about mapset
projections/coordinate systems/datum in GRASS-5. Let me start with a few.

  1.) When I used r.in.gdal to import a DEM, the PROJ_UNITS file contains

unit: unknown
units: unknowns
meter: 1

  Can someone please interpret this for me? I assume that it means the units
are meters, but why this syntax?

  2.) Considering the same data set, the DEFAULT_WIND file contains:

proj:       1
zone:       11
north:      4469934
south:      4455924
east:       404501.28124
west:       393671.28124
cols:       361
rows:       467
e-w resol:  30
n-s resol:  30

  I assume that "proj: 1" indicates UTM (because the PROJ_INFO file says
so. But, where is the file that associates the number with the projection
name? I've looked all through /usr/local/grass5/etc and the other
directories there, but can't find it.



Dr. Richard B. Shepard, President

                       Applied Ecosystem Services, Inc. (TM)
            2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
 + 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard at appl-ecosys.com
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