[GRASS-user] help needed with polar projections

[Daniel.Gillespie at noaa.gov]

Hello:

I am new Grass user, and am having some problems trying to set up a
polar projection.  I am using Grass 6.0.2 that I compiled, and am
working on a RedHat Linux system.

I have tried to set up a Universal Polar Stereographic (UPS) projection,
as well as an Antarctic Polar Stereographic projection.  The UPS
projection did not appear to work at all.  The Antartic Polar
Stereographic projection didn't fail, but when I reproject a vector file
with Antarctica, the results are not what I expected.  I think that I
may have set the default region incorrectly, because only a small
portion of Antarctica appears in the monitor.  The details of the
projections and region follow below.

Any suggestions for how to set up a UPS projection or other polar
projections, or how to define the region setting properly for the
Antarctic polar projection would be much appreciated!

Many thanks,

Dan Gillespie

..................................

Here are the projection parameters for the 2 locations:


UPS 
	GRASS 6.0.2 (SouthPole2):~ >  g.proj -w
	WARNING: OGR can't parse PROJ.4-style parameter string:
        	 +proj=ups +south +a=6378137 +rf=298.257223563 +no_defs
         	 +towgs84=0.000,0.000,0.000 +to_meter=1.0000000000
         	 (OGR Error code was 5)
	WARNING: g.proj: Unable to convert to WKT


Antarctic Polar Stereographic
	GRASS 6.0.2 (SouthPole4):~ > g.proj -w
	PROJCS["Stereographic",
    	   GEOGCS["wgs84",
              DATUM["unknown",
                  SPHEROID["wgs84",6378137,298.257223563]],
              PRIMEM["Greenwich",0],
              UNIT["degree",0.0174532925199433]],
    	PROJECTION["Polar_Stereographic"],
    	PARAMETER["latitude_of_origin",-71],
    	PARAMETER["central_meridian",70],
    	PARAMETER["scale_factor",1],
    	PARAMETER["false_easting",0],
    	PARAMETER["false_northing",0],
    	UNIT["meters",1]]
	
	Here is the default region for this location:
	N: 0
	S: -90
	W: -180
	E: 180
	grid resolution NS:  1
			EW:  1
	rows: 90
	columns: 360