Hi, I did it with the batch convert. First do r.out.arc and then provide gdal_trnaslate with options a_srs "EPSG:2169", a_nodata -9999 and interleave=pixel
Thanks for your fast reply, Christian > -----Ursprüngliche Nachricht----- > Von: Maciej Sieczka [mailto:[EMAIL PROTECTED] > Gesendet: Mittwoch, 10. Oktober 2007 09:52 > An: [EMAIL PROTECTED] > Cc: grassuser@grass.itc.it > Betreff: Re: [GRASS-user] Export of GeoTIFF > > [EMAIL PROTECTED] wrote: > > > I have serious problems exporting GRASS DCELL rasters to GeoTIFF. > > I used r.out.gdal with type=Float32 and set the compression to LZW. > > What I got later on in ArcView 3.3 is pure noise fort he picture and > in > > ArcGIS 9.2 I get some strange results. > > The NULL values of the picture get a cryptic code like -1#QUAN1 and > if > > there are pixels with value 0 they become NoData in ArcGIS. > > Christian, > > Do the GeoTIFFs look OK in other software e.g. QGIS or OpenEV? > > What GRASS version? r.out.gdal in GRASS < 6.3 is a shell > script (wrapper around gdal_translate) and works well > AFAICT. It's also present in GRASS 6.3 as r.out.gdal.sh. > > But, the r.out.gdal in 6.3 is a new module written in C, and > it has a bug about null data handling [1]. I'm not sure, > but maybe it's related. > > Please try the shell script r.out.gdal version and let us > know if it works. > > If neither does please provide a sample dataset and a > procedure to reproduce the error. > > > I need to have them as GeoTIFFs for the easy im- and export. I am > aware > > that I can also use r.out.ascii but then I have to do an import > procedure > > in ArcGIS. For nearly 1000 images that is a bit hard to do. > > As a workaround you can export with r.out.ascii and > batch-convert them into GeoTIFF with gdal_translate, eg. > given that your ascii rasters have "asc" extension: > > for i in *.asc; do gdal_translate (your options go here) $i > $i.tif; done > > [1]http://wald.intevation.org/tracker/?func=detail&aid=405&group_id=21&; > atid=204 > > Maciek _______________________________________________ grassuser mailing list grassuser@grass.itc.it http://grass.itc.it/mailman/listinfo/grassuser
