[GRASS-user] Help: Converting a raster map between locations (from wgs84 lat / long to UTM)

[Daniel Victoria]

It's because your region in the target location is wrong.

Here is a little trick:

In your lat/lon location, after you set your region, run the command
v.in.region (check correct syntax). This will create a bounding box of
the region.

Then, go to your target location (UTM) and use the command v.proj to
import the vector you just created.

Now, set your region to the imported vector with g.region
vect=name_of_vector_here

Finally, run r.proj!!

The only problem at which I don't know any exact method is setting the
target resolution correctly... I know it's done with g.region res=XX
but, the conversion from lat/long to meters is not a straight one...

Cheers
Daniel

On Wed, Oct 22, 2008 at 2:44 PM, Corrado <ct529 at york.ac.uk> wrote:
> Dear friends,
>
> I am trying to convert a GTOPO30 DEM (raster) map (for UK) from lat / long wgs
> 84 to UTM for UK.
>
> I am running into rserious problems. I am using the procedure as described in
> the book open source gis a grass gis approach"
>
> 1) in the WGS84 lat long location (ukll) I resize the map using d.zoom
> 2) I save the new region as well as the new sub-raster (for scotland)
> 3) I open grass in the UTM location
> 4) I try to import using
>
> r.proj in=gtopo30_cs out=gtopo30_cs_utm location=ukll mapset=PERMANENT
> method=cubic --o
>
> All I can get is: ERROR: Input map is outside current region
>
> What am I doing wrong? I have tried so many different alternative solution.
>
> Best,
> --
> Corrado Topi
>
> Global Climate Change & Biodiversity Indicators
> Area 18,Department of Biology
> University of York, York, YO10 5YW, UK
> Phone: + 44 (0) 1904 328645, E-mail: ct529 at york.ac.uk
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