Hello Micha, Thank you very much for your help. The EPSG:4326 coordinate system was the thing I was looking for!
/johannes -------- Original-Nachricht -------- > Datum: Mon, 15 Aug 2011 12:30:28 +0300 > Von: Micha Silver <mi...@arava.co.il> > An: Johannes Radinger <jradin...@gmx.at> > CC: grass-user@lists.osgeo.org > Betreff: Re: [GRASS-user] Re: Import global maps (Ascii, png or KLM) from > riverthreat.net > On Mon, 2011-08-15 at 10:24 +0200, Johannes Radinger wrote: > > Hello again! > > > > Just to follow up my last weeks question: > > Is there anyone who can help me how to import a map from > > riverthreat.net? What are the appropriate settings of the > > coordinate system? and how do I have to import the raster > > maps? For more info just see email below. > > > > I tried with the ASCII formatted data and it works fine using the GRASS > r.in.arc module. Here are the steps: > Create a GRASS location based on the EPSG:4326 coordinate reference > system, and set its region to the whole world, with resolution 0.5 deg: > > g.region e=180 w=-180 n=90 s=-90 res=0.5 -p > > Download the ASCII file. I had to make one small change in the ARC/Info > headers: the NOVALUE number should be an integer, so just change it to > -9999 (instead of -9999.00000). > Now: > > r.in.arc Pesticide_Loading.asc out=pesticide > > and display the resulting raster. > > -- > Micha > > > thank you very much > > /Johannes > > > > > > -------- Original-Nachricht -------- > > Datum: Wed, 10 Aug 2011 12:43:42 +0200 > > Von: "Johannes Radinger" <jradin...@gmx.at> > > An: grass-user@lists.osgeo.org > > Betreff: Import global maps (Ascii, png or KLM) from riverthreat.net > > > > Hello, > > > > I've a question concerning the import of raster maps into grass: > > > > On http://www.riverthreat.net/data.html it is possible to get > > worldwide data on river threats and environmental pressures. The data > > are provided either as images (png), ascii files or Google-Earth KLM > files > > with a resolution of 30 seconds (0.5 degrees). > > > > I'd like to import some of these maps into grass gis for further > analysis. Thus some questions arise: > > > > *Which coordinate system do I have to select so that the data are > displayed correctly? > > * What is the best data format for the import? I think maybe Ascii? > These files have a header like following: > > ncols 720 > > nrows 360 > > xllcorner -180.000000 > > yllcorner -90 > > cellsize 0.500000 > > NODATA_value -9999.000000 > > > > Maybe you can help me with the import! > > > > Thank you very much > > Johannes > > -- > > NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie! > > Jetzt informieren: http://www.gmx.net/de/go/freephone > > > > > > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user -- NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie! Jetzt informieren: http://www.gmx.net/de/go/freephone _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user