[GRASS-user] Datum not recognised

[Paul Kelly]

On Mon, 8 Feb 2010, Anders Kagervall wrote:

> Hi,
> I am quite new to GRASS and this is my first post to this list. To familiarize myself
> with the software I have started to import data and now and then I get this warning:
> "Datum <Rikets_koordinatsystem_1990> not recognised by GRASS and no parameters found"
> Is this something I should be concerned about and how can I get rid of it?

Thanks for reporting this. The problem is simply that support for the 
Swedish datum rt90 was never added to GRASS. I've now added it in SVN to 
7.0, 6.5 and 6.4. Having the datum undefined will only cause problems if 
you wish to reproject maps or data from/to your location.

If you've updated from SVN and want to include the datum parameters in 
your location you can run
g.proj -c epsg=3021
and it will update the support files (PROJ_INFO in particular).

Paul