id summary reporter owner description type status priority component version resolution keywords cc 288 GDAL - Datum shift issue (WGS84, NAD27, NAD83) tcgeophysics osgeo4w-dev@… "Hi All, I am encountering a gdalwarp issue that I have a hard time narrowing down... I have a Canadian DEM (CDED) in USGS DEM format in Lat/Lon NAD83 (EPSG 4269) and I want to convert it to an ER Mapper ERS format in UTM Zone 16 NAD27 (EPSG 26716). The command I use is the following: > gdalwarp -s_srs EPSG:4269 -t_srs EPSG:26716 -of ERS 042c_0100_deme.dem 042c_0100_deme_NAD27UTMZ16N.ers And the output is: > ERROR 1: No such file or directory > ERROR 1: GDALSuggestedWarpOutput() failed because the passed transformer failed. GDAL was installed using osgeo4w.exe installer on my Window 7 machine. After doing some research it seems that datum shift grids may not be built by default with Proj.4. Is there other dependencies that may affect datum shifts? How can I check that datum shift grids were built and which ones? What can be an approach to add other datum shift grids? Thanks Thomas" defect closed major Package worksforme Datum shift grids NAD27 proj