[GRASS-user] Warning regarding Datum unknown not recognised by GRASS

[Markus Neteler]

Hi Kim,

On Tue, Jun 29, 2010 at 6:37 PM, Kim Besson <kimbesson1981 at gmail.com> wrote:
> Hello Markus
> Thanks for the reply
> To do what you suggest, I would have to retrieve LOCATION's CRS EPSG code
> and I'm not able to get it automatically. I only can get that PROJ4 string
> by using g.proj. Is there a way to automatically get a LOCATIONS's EPSG
> code?

That not possible (yet?) - also GDAL/OGR does not have a reverse
lookup - too complicated or too many exceptions.

The string
+proj=utm +south +no_defs +zone=24 +a=6378137 +rf=298.257223563
+towgs84=0.000,0.000,0.000 +to_meter=1

looks like
 http://spatialreference.org/ref/epsg/32724/
to me.

cs2cs -le | grep 'WGS 84'
    WGS84 a=6378137.0      rf=298.257223563 WGS 84

Markus