Hi, On Mon, Nov 11, 2013 at 11:37 PM, Lee Eddington <[email protected]>wrote:
> I'm trying to import a NetCDF file from the WRF weather forecast model > with r.in.gdal, but I can't get it to georeference. Instead I end up with > a x,y coordinate system of rows and columns. The file georeferences fine > in a number of other weather graphics programs. I tried to follow the > directions at: > > http://www.gdal.org/frmt_netcdf.html > > but when I run gdalinfo I get the following: > > $ gdalinfo geo_em.d03.nc > > Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute > > Driver: netCDF/Network Common Data Format > > Files: geo_em.d03.nc > > Size is 512, 512 > > Coordinate System is `' > > Metadata: > > NC_GLOBAL#BOTTOM-TOP_GRID_DIMENSION=0 > > NC_GLOBAL#CEN_LAT=-8.4095154 > > NC_GLOBAL#CEN_LON=115.02 > > NC_GLOBAL#corner_lats={ -10.454437, -6.3537445, -6.3537445, -10.454437, > -10.454437, -6.3537445, -6.3537445, -10.454437, -10.46785, -6.3401871, > -6.3401871, -10.46785, -10.46785, -6.3401871, -6.3401871, -10.46785 } > > NC_GLOBAL#corner_lons={ 112.3332, 112.3332, 117.70679, 117.70679, > 112.31956, 112.31956, 117.72044, 117.72044, 112.3332, 112.3332, 117.70679, > 117.70679, 112.31956, 112.31956, 117.72044, 117.72044 } > > NC_GLOBAL#DX=3000 > > NC_GLOBAL#DY=3000 > > NC_GLOBAL#DYN_OPT=2 > > NC_GLOBAL#FLAG_MF_XY=1 > > NC_GLOBAL#grid_id=3 > > NC_GLOBAL#GRIDTYPE=C > > NC_GLOBAL#i_parent_end=99 > > NC_GLOBAL#i_parent_start=34 > > NC_GLOBAL#ISICE=24 > > NC_GLOBAL#ISLAKE=-1 > > NC_GLOBAL#ISOILWATER=14 > > NC_GLOBAL#ISURBAN=1 > > NC_GLOBAL#ISWATER=16 > > NC_GLOBAL#j_parent_end=84 > > NC_GLOBAL#j_parent_start=34 > > NC_GLOBAL#MAP_PROJ=3 > > NC_GLOBAL#MMINLU=USGS > > NC_GLOBAL#MOAD_CEN_LAT=-8.4095078 > > NC_GLOBAL#NUM_LAND_CAT=24 > > NC_GLOBAL#parent_grid_ratio=3 > > NC_GLOBAL#parent_id=2 > > NC_GLOBAL#POLE_LAT=90 > > NC_GLOBAL#POLE_LON=0 > > NC_GLOBAL#SIMULATION_START_DATE=0000-00-00_00:00:00 > > NC_GLOBAL#SOUTH-NORTH_GRID_DIMENSION=154 > > NC_GLOBAL#SOUTH-NORTH_PATCH_END_STAG=154 > > NC_GLOBAL#SOUTH-NORTH_PATCH_END_UNSTAG=153 > > NC_GLOBAL#SOUTH-NORTH_PATCH_START_STAG=1 > > NC_GLOBAL#SOUTH-NORTH_PATCH_START_UNSTAG=1 > > NC_GLOBAL#sr_x=1 > > NC_GLOBAL#sr_y=1 > > NC_GLOBAL#STAND_LON=115.02 > > NC_GLOBAL#TITLE=OUTPUT FROM GEOGRID V3.4 > > NC_GLOBAL#TRUELAT1=-8.4095001 > > NC_GLOBAL#TRUELAT2=0 > > NC_GLOBAL#WEST-EAST_GRID_DIMENSION=199 > > NC_GLOBAL#WEST-EAST_PATCH_END_STAG=199 > > NC_GLOBAL#WEST-EAST_PATCH_END_UNSTAG=198 > > NC_GLOBAL#WEST-EAST_PATCH_START_STAG=1 > > NC_GLOBAL#WEST-EAST_PATCH_START_UNSTAG=1 > > Subdatasets: > > SUBDATASET_1_NAME=NETCDF:"geo_em.d03.nc":Times > > SUBDATASET_1_DESC=[1x19] Times (8-bit character) > > SUBDATASET_2_NAME=NETCDF:"geo_em.d03.nc":XLAT_M > > SUBDATASET_2_DESC=[1x153x198] XLAT_M (32-bit floating-point) > > SUBDATASET_3_NAME=NETCDF:"geo_em.d03.nc":XLONG_M > > SUBDATASET_3_DESC=[1x153x198] XLONG_M (32-bit floating-point) > > SUBDATASET_4_NAME=NETCDF:"geo_em.d03.nc":XLAT_V > . > . > . > . > > Corner Coordinates: > > Upper Left ( 0.0, 0.0) > > Lower Left ( 0.0, 512.0) > > Upper Right ( 512.0, 0.0) > > Lower Right ( 512.0, 512.0) > > Center ( 256.0, 256.0) > > The warning - > > Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute > > leads me to believe that all the projection info is not being recognized, > but I'm not sure why. Is it possible that GDAL wasn't compiled with > libnetcdf? > But if that's the case I would think that gdalinfo wouldn't work at all. > > I've imported the data into GRASS using: > > r.in.gdal input="NETCDF:geo_em.d03.nc:HGT_M" output="d03_HGT_M" > location="bali_d03" > > to create a new location. > > I also created a location with the Mercator projection of the data and > tried importing using: > > r.in.gdal -o input="NETCDF:grassdata/bali/geo_em.d03.nc:HGT_M" > output="d03_HGT_M" > > but as far as I can tell still get an x,y row,column coordinate system. > > I also have the lat and lon of each cell. Is there anyway to georeference > using that data? > > try to create a WGS84 latitude-longitude projection (EPSG 4326) and then run r.in.gdal with -o flag. At least that worked for me and I had similar gdalinfo output. Anna > Thanks, > Lee > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user >
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