[GRASS-user] DAtum Warning while using r.in.gdal

[Micha Silver]

On 05/31/2010 07:25 PM, Kim Besson wrote:
> Greetings
>
> Following a few suggestions made at this list I'm using gdalwarp to 
> project a few landsat images and only then yusing r.in.gdal.
>
> I'm using this expression to reproject image:
> gdalwarp -t_srs "+proj=tmerc +lat_0=39.66825833333333 
> +lon_0=-8.133108333333334 +k=1 +x_0=0 +y_0=0 +ellps=GRS80 +units=m 
> +no_defs " L71203033_03320001023_B10.TIF  landsat_out.tif
>
> And when I run r.in.gdal I get this warning:
> Datum <unknown> not recognised by GRASS and no parameters found
> Projection of input dataset and current location appear to match
>
> What does this means?
>
There's no +datum=  parameter in the CRS definition, so the new, 
projected tif has no datum information. But, if you're sure the above 
parameters are correct, you can ignore the warning and tell GRASS to 
ignore the warning with the "-o" option to r.in.gdal.
BTW, how did you define the GRASS Location? with the EPSG:3763 or the 
above definition? If so, then you surely should have no problem 
importing with the -o (over-ride projection check) option.

> Thanks
> kim
>
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-- 
Micha Silver
Arava Development Co. +972-52-3665918
http://www.surfaces.co.il


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