On 18/03/17 12:15, Paulo van Breugel wrote: > > > On 18-03-17 10:06, Paulo van Breugel wrote: >> Dear all, >> >> I have a shapefile which is in CRS ESRI:37203 [1], which is defined in >> the prj file as >> >> GEOGCS["GCS_Everest_India_Nepal",DATUM["D_Everest_India_Nepal",SPHEROID["Everest_Definition_1962",6377301.243,300.8017255]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]
[SNIP] >> +proj=longlat +a=6377301.243 +b=6356100.2284 >> +towgs84=295,736,257,0,0,0,0 +no_defs Are you sure that your "+towgs84" parameters are correct? It seems to me that you intend to apply a three parameter transformation, but you are specifying a seven parameter transform with the scaling (last parameter) set to "0", which might have unintended consequences. To specify a three parameter datum transform: +towgs84=295,736,257 If you really want to specify all seven parameters, but want only the first three to take effect: +towgs84=295,736,257,0,0,0,1 Best, Ben >> >> Question 2: In QGIS it is possible to define a custom CRS using the >> above. Can I do this in GRASS as well, and if so, how? Or can / should >> I add this to the datum information files in $GISBASE/etc/proj/ogr_csv? >> >> >> Regards, >> >> Paulo >> >> >> [1] https://epsg.io/37203 >> [2] >> https://disqus.com/home/discussion/qgistutorials/georeferencing_topo_sheets_and_scanned_maps/#comment-1426454689 > > A link that provides further relevant information > > https://github.com/klokantech/epsg.io/issues/49 > > > > > _______________________________________________ > grass-dev mailing list > grass-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/grass-dev > -- Dr. Benjamin Ducke {*} Geospatial Consultant {*} GIS Developer Spatial technology for the masses, not the classes: experience free and open source GIS at http://gvsigce.org _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-dev