[GRASS-user] European Datum 1950 is not saved in the region information

thirza sophiav at gmail.com
Thu Nov 3 08:45:27 EDT 2011


Hi,
I've set up a location (GRASS 6.4.2. RC1487 15M (2011)), using the Location
wizard, by selecting the coordinate system parameters as so:

projection: UTM
datum with ellipsoid: projection zone 30N
datum code: eur50 (European datum 1950)

when I run g.region -p I get the following:

projection: 1 (UTM)
zone:       30
datum:      ** unknown (default: WGS84) **
ellipsoid:  international

Is it a problem that the datum has not been saved as European datum 1950? 

The reason I'm asking is that when I pull a vector map from this location
into a location with the following projection parameters
projection: 3 (Latitude-Longitude)
zone:       0
datum:      wgs84
ellipsoid:  wgs84 

I get slightly different re-projected coordinates than a colleague who does
the same process in ArcGIS. I would like to confirm that the UTM location is
set up correctly.

Many thanks for your help,

Sophie

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