Thanks Chaitanya, I intended to avoid all this writing to make sure the nadgrid is used:
*gdalwarp -s_srs "+proj=utm +zone=30 +ellps=intl +units=m +nadgrids=R2009V9.gsb +wktext" -t_srs "+proj=longlat +ellps=GRS80 +towgs84=0,0,0" rast_23030.tif rast_4258.tif* But after reading this[1] I just realise that there is not such a configuration file to search for in GDAL. After all is not that big issue. Thanks anyway. By, [1] http://www.osgeo.org/pipermail/gdal-dev/2007-April/012561.html <http://www.osgeo.org/pipermail/gdal-dev/2007-April/012561.html> Eloi Ribeiro GIS Analyst 39,45º -4,40º http://eloiribeiro.wordpress.com On Sun, Oct 17, 2010 at 14:46, Chaitanya kumar CH <chaitanya...@gmail.com>wrote: > Eloi, > > You can find the files at gdal/data/pcs.csv and gdal/data/gcs.csv > You may also want to refer to http://www.gdal.org/ogr/osr_tutorial.html > > On Sun, Oct 17, 2010 at 5:18 PM, Eloi Ribeiro <eloi.ribe...@gmail.com>wrote: > >> In other words, >> >> When I ask GDAL for: >> *gdalwarp -s_srs EPSG:23030 -t_srs EPSG:4258 rast_23030.tif rast_4258.tif >> * >> >> GDAL knows that 'EPSG:23030' means '+proj=utm +zone=30 +ellps=intl >> +units=m +no_defs'. >> So my question is: From witch file GDAL gets that information from? >> >> Cheers, >> >> Eloi Ribeiro >> GIS Analyst >> 39,45º -4,40º >> http://eloiribeiro.wordpress.com >> >> >> On Mon, Oct 11, 2010 at 14:55, Eloi Ribeiro <eloi.ribe...@gmail.com>wrote: >> >>> Hi all, >>> >>> I would like that every time a I use gdalwarp for some EPSG codes [1] >>> transformation it would use by default the nadgrids [2] (for Portugal and >>> Spain) that I have under the folder '/usr/share/proj/'. >>> >>> For that purpose in PostGIS I needed to add >>> '+nadgrids=nadgrid_file_name.gsb' at the end of the line of the 'proj4text' >>> field text in table 'spatial_ref_sys' for each EPSG code I wonted to use the >>> nadgrid. >>> >>> So I suppose there must be a similar way of doing this with GDAL. How can >>> I achieve this with GDAL? >>> >>> Thank's! >>> >>> [1] 27492,27493,20790,20791,23029,23030,23031,3763,4258,4326 >>> [2] pt73_e89.gsb, ptLX_e89.gsb, ptLB_e89.gsb, ptED_e89.gsb, R2009V9.gsb, >>> BALR2009.gsb >>> >>> >>> Eloi Ribeiro >>> GIS Analyst >>> 39,45º -4,40º >>> http://eloiribeiro.wordpress.com >>> >> >> >> _______________________________________________ >> gdal-dev mailing list >> gdal-dev@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/gdal-dev >> > > > > -- > Best regards, > Chaitanya kumar CH. > /tʃaɪθənjə/ /kʊmɑr/ > +91-9494447584 > 17.2416N 80.1426E >
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