id summary reporter owner description type status priority milestone component version severity resolution keywords cc 4204 Duplication in Metadata when translating from NetCDF to NetCDF hsumanto warmerdam "Let's say we need to perform the translation below to change nodata to certain value: gdal_translate -of netCDF -a_nodata 0 L71092086_08620110129_B50-netCDF-small.nc L71092086_08620110129_B50-netCDF-small-withnodata.nc If you look at the gdalinfo of the new NetCDF file, you will notice that some metadata/attributes such as Conventions, grid_mapping, long_name, etc have been duplicated as shown below. {{{ Driver: netCDF/Network Common Data Format Files: L71092086_08620110129_B50-netCDF-small.nc L71092086_08620110129_B50-netCDF-small.nc.aux.xml Size is 333, 333 Coordinate System is: PROJCS[""WGS 84 / UTM zone 55N"", GEOGCS[""WGS 84"", ... UNIT[""metre"",1, AUTHORITY[""EPSG"",""9001""]], AUTHORITY[""EPSG"",""32655""]] Origin = (281385.000000000000000,-4040685.000000000000000) Pixel Size = (30.030030030030030,-30.030030030030030) Metadata: NC_GLOBAL#Conventions=CF-1.0 Band1#grid_mapping=transverse_mercator Band1#long_name=GDAL Band Number 1 transverse_mercator#Northernmost_Northing=-4.04068e+06 transverse_mercator#Southernmost_Northing=-4.05068e+06 transverse_mercator#Easternmost_Easting=291385 transverse_mercator#Westernmost_Easting=281385 transverse_mercator#spatial_ref=PROJCS[""WGS 84 / UTM zone 55N"",GEOGCS[""WGS 84"",DATUM[""WGS_1984"",SPHEROID[""WGS 84"",6378137,298.257223563,AUTHORITY[""EPSG"",""7030""]],AUTHORITY[""EPSG"",""6326""]],PRIMEM[""Greenwich"",0],UNIT[""degree"",0.0174532925199433],AUTHORITY[""EPSG"",""4326""]],PROJECTION[""Transverse_Mercator""],PARAMETER[""latitude_of_origin"",0],PARAMETER[""central_meridian"",147],PARAMETER[""scale_factor"",0.9996],PARAMETER[""false_easting"",500000],PARAMETER[""false_northing"",0],UNIT[""metre"",1,AUTHORITY[""EPSG"",""9001""]],AUTHORITY[""EPSG"",""32655""]] transverse_mercator#GeoTransform=281385 30.03003003003003 0 -4040685 0 -30.03003003003003 transverse_mercator#grid_mapping_name=transverse_mercator transverse_mercator#latitude_of_projection_origin=0.000000e+00 transverse_mercator#longitude_of_central_meridian=1.470000e+02 transverse_mercator#scale_factor_at_central_meridian=9.996000e-01 transverse_mercator#false_easting=5.000000e+05 transverse_mercator#false_northing=0.000000e+00 AREA_OR_POINT=Point Corner Coordinates: Upper Left ( 281385.000,-4040685.000) (144d33'34.28""E, 36d29'11.56""S) Lower Left ( 281385.000,-4050685.000) (144d33'24.08""E, 36d34'35.81""S) Upper Right ( 291385.000,-4040685.000) (144d40'15.85""E, 36d29'19.59""S) Lower Right ( 291385.000,-4050685.000) (144d40' 6.12""E, 36d34'43.86""S) Center ( 286385.000,-4045685.000) (144d36'50.08""E, 36d31'57.75""S) Band 1 Block=333x1 Type=Byte, ColorInterp=Gray NoData Value=0 Metadata: NETCDF_VARNAME=Band1 }}} {{{ Driver: netCDF/Network Common Data Format Files: L71092086_08620110129_B50-netCDF-small-withnodata.nc L71092086_08620110129_B50-netCDF-small-withnodata.nc.aux.xml Size is 333, 333 Coordinate System is: PROJCS[""WGS 84 / UTM zone 55N"", GEOGCS[""WGS 84"", ... UNIT[""metre"",1, AUTHORITY[""EPSG"",""9001""]], AUTHORITY[""EPSG"",""32655""]] Origin = (281385.000000000000000,-4040685.000000000000000) Pixel Size = (30.030030030030030,-30.030030030030030) Metadata: NC_GLOBAL#Conventions=CF-1.0 NC_GLOBAL#NC_GLOBAL-Conventions=CF-1.0 NC_GLOBAL#Band1-grid_mapping=transverse_mercator NC_GLOBAL#Band1-long_name=GDAL Band Number 1 NC_GLOBAL#transverse_mercator-Northernmost_Northing=-4.04068e+06 NC_GLOBAL#transverse_mercator-Southernmost_Northing=-4.05068e+06 NC_GLOBAL#transverse_mercator-Easternmost_Easting=291385 NC_GLOBAL#transverse_mercator-Westernmost_Easting=281385 NC_GLOBAL#transverse_mercator-spatial_ref=PROJCS[WGS 84 / UTM zone 55N,GEOGCS[WGS 84,DATUM[WGS_1984,SPHEROID[WGS 84,6378137,298.257223563,AUTHORITY[EPSG,7030]],AUTHORITY[EPSG,6326]],PRIMEM[Greenwich,0],UNIT[degree,0.0174532925199433],AUTHORITY[EPSG,4326]],PROJECTION[Transverse_Mercator],PARAMETER[latitude_of_origin,0],PARAMETER[central_meridian,147],PARAMETER[scale_factor,0.9996],PARAMETER[false_easting,500000],PARAMETER[false_northing,0],UNIT[metre,1,AUTHORITY[EPSG,9001]],AUTHORITY[EPSG,32655]] NC_GLOBAL#transverse_mercator-GeoTransform=281385 30.03003003003003 0 -4040685 0 -30.03003003003003 NC_GLOBAL#transverse_mercator-grid_mapping_name=transverse_mercator NC_GLOBAL#transverse_mercator-latitude_of_projection_origin=0.000000e+00 NC_GLOBAL#transverse_mercator-longitude_of_central_meridian=1.470000e+02 NC_GLOBAL#transverse_mercator-scale_factor_at_central_meridian=9.996000e-01 NC_GLOBAL#transverse_mercator-false_easting=5.000000e+05 NC_GLOBAL#transverse_mercator-false_northing=0.000000e+00 NC_GLOBAL#AREA_OR_POINT=Point Band1#grid_mapping=transverse_mercator Band1#long_name=GDAL Band Number 1 Band1#NETCDF_VARNAME=Band1 transverse_mercator#Northernmost_Northing=-4.04068e+06 transverse_mercator#Southernmost_Northing=-4.05068e+06 transverse_mercator#Easternmost_Easting=291385 transverse_mercator#Westernmost_Easting=281385 transverse_mercator#spatial_ref=PROJCS[""WGS 84 / UTM zone 55N"",GEOGCS[""WGS 84"",DATUM[""WGS_1984"",SPHEROID[""WGS 84"",6378137,298.257223563,AUTHORITY[""EPSG"",""7030""]],AUTHORITY[""EPSG"",""6326""]],PRIMEM[""Greenwich"",0],UNIT[""degree"",0.0174532925199433],AUTHORITY[""EPSG"",""4326""]],PROJECTION[""Transverse_Mercator""],PARAMETER[""latitude_of_origin"",0],PARAMETER[""central_meridian"",147],PARAMETER[""scale_factor"",0.9996],PARAMETER[""false_easting"",500000],PARAMETER[""false_northing"",0],UNIT[""metre"",1,AUTHORITY[""EPSG"",""9001""]],AUTHORITY[""EPSG"",""32655""]] transverse_mercator#GeoTransform=281385 30.03003003003003 0 -4040685 0 -30.03003003003003 transverse_mercator#grid_mapping_name=transverse_mercator transverse_mercator#latitude_of_projection_origin=0.000000e+00 transverse_mercator#longitude_of_central_meridian=1.470000e+02 transverse_mercator#scale_factor_at_central_meridian=9.996000e-01 transverse_mercator#false_easting=5.000000e+05 transverse_mercator#false_northing=0.000000e+00 AREA_OR_POINT=Point Corner Coordinates: Upper Left ( 281385.000,-4040685.000) (144d33'34.28""E, 36d29'11.56""S) Lower Left ( 281385.000,-4050685.000) (144d33'24.08""E, 36d34'35.81""S) Upper Right ( 291385.000,-4040685.000) (144d40'15.85""E, 36d29'19.59""S) Lower Right ( 291385.000,-4050685.000) (144d40' 6.12""E, 36d34'43.86""S) Center ( 286385.000,-4045685.000) (144d36'50.08""E, 36d31'57.75""S) Band 1 Block=333x1 Type=Byte, ColorInterp=Gray NoData Value=0 Metadata: NETCDF_VARNAME=Band1 }}} " defect closed normal default unspecified normal fixed netcdf,gdal_translate Kyle Shannon