[GRASS5] Problems with UTM/southern hemisphere

[Frank Warmerdam]

Markus Neteler wrote:
> Hi,
> 
> a colleague of mine from Argentina is facing problems
> to import LANDSAT data in UTM.
> 
> Displaying a map leads to:
> 
> GRASS 5.7.cvs > d.rast markus.1
> WARNING: [markus.1] in mapset [beinlich] - in different zone [20] than
>          current region [-20]

Markus,

I don't know why the above occurs, but I did want to explain that the
following is indeed a proper southern hemisphere definition.  The
southern hemisphere in WKT is noted by a false northing of 10000000.

> GRASS 5.7.cvs > g.proj -w
> PROJCS["UTM Zone 20, Southern Hemisphere",
>     GEOGCS["wgs84",
>         DATUM["WGS_1984",
>             SPHEROID["wgs84",6378137,298.257223563],
>             TOWGS84[0.000,0.000,0.000]],
>         PRIMEM["Greenwich",0],
>         UNIT["degree",0.0174532925199433]],
>     PROJECTION["Transverse_Mercator"],
>     PARAMETER["latitude_of_origin",0],
>     PARAMETER["central_meridian",-63],
>     PARAMETER["scale_factor",0.9996],
>     PARAMETER["false_easting",500000],
>     PARAMETER["false_northing",10000000],
>     UNIT["meter",1]]
> 
> May it be possible that G_get_projinfo() doesn't understand
> well that 'south' is defined?

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent