[Gdal-dev] GDAL error exporting grass raster to Gtiff
dylan.beaudette at gmail.com
Wed Nov 8 12:08:37 EST 2006
On Wednesday 08 November 2006 02:38, Yves Jacolin wrote:
> Le Mardi 7 Novembre 2006 21:07, Markus Neteler a écrit :
> > On Tue, Nov 07, 2006 at 12:42:11PM +0100, Yves Jacolin wrote:
> > ...
> > > Is it correct ? Is it normal that gdal-grass doesn't appear ?
> > Ah, yes, I think that it doesn't appear there since it is loaded
> > only on demand.
> > > Y.
> > > PS : is it the right list to post this problem ?
> > Hope so :-)
> > Please have a look at
> > http://grass.gdf-hannover.de/wiki/Compile_and_install_GRASS_and_QGIS_with
> >_G DAL/OGR_Plugin#Troubleshooting
> > Markus
> All seems fine! BTW I found another way to export my raster. Thank you very
> much for your help.
I have encountered some problems in creating an ESRI-friendly geotiff using
r.out.gdal directly. Fortunately I was able to use the following to get a
# export to AAIgrid with nodata set to -9999
r.out.arc in=ca_90m_dem_meters out=ca_90m
# convert to geotiff with gdal_translate
gdal_translate -a_srs "+proj=aea +x_0=0.0 +y_0=0 +lon_0=-96 +lat_0=40.0
+lat_1=20 +lat_2=60.0 +datum=NAD83 +units=m" \
-a_nodata -9999 \
-co INTERLEAVE=PIXEL \
-co TFW=YES \
-co COMPRESS=DEFLATE \
I wonder if there is a better way? The main problem lies in the fact that
r.out.gdal encodes GRASS NULL values as NaN, which doesn't seem to carry over
to other programs...
Soils and Biogeochemistry Graduate Group
University of California at Davis
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