The file has no subdatasets, so you can use any of the gdal tools (gdalwarp, gdal_translate) normally. If you want a gtiff file you would use gdal_translate
gdal_translate -of gtiff in.nc out.tif On Tue, Aug 6, 2013 at 11:38 AM, Gunnar Oehmichen <[email protected]> wrote: > Hi, > > this is my first time using netcdf data and gdal library on Ubuntu 12.04 > > I have downloaded a subsetted monthly precipitation dataset from: > > http://www.esrl.noaa.gov/psd/data/gridded/data.cmap.html > > I want to create timelines of a few gridcells (covering germany) > > As I understand, before converting bands to raster-images by gdal_translate > one has to extract information from the subdatasets. > > My Problem is: > > using > > gdalinfo X139.14.20.244.217.3.48.41.nc > gdalinfo.txt > > No subdatasets appear. I would have expected something like to the follwing > to be included in the output of gdalinfo: > > SUBDATASET_1_NAME=NETCDF:... > SUBDATASET_1_DESC=... > SUBDATASET_2_NAME=... > SUBDATASET_2_DESC=... > SUBDATASET_3_NAME=... > SUBDATASET_3_DESC=... > > Instead the output is as following: > > Driver: netCDF/Network Common Data Format > Files: X139.14.20.244.217.3.47.29.nc > Size is 6, 5 > Coordinate System is `' > Origin = (2.500000000000000,57.500000000000000) > Pixel Size = (2.500000000000000,-2.500000000000000) > Metadata: > lat#actual_range={ 56.25, 46.25 } > lat#axis=Y > lat#long_name=Latitude > lat#standard_name=latitude > lat#units=degrees_north > lon#actual_range={ 3.75, 16.25 } > lon#axis=X > lon#long_name=Longitude > lon#standard_name=longitude > lon#units=degrees_east > NC_GLOBAL#Conventions=COARDS > > NC_GLOBAL#documentation=http://www.esrl.noaa.gov/psd/data/gridded/data.cmap.html > NC_GLOBAL#history=Tue Aug 6 03:47:30 2013: ncks -O -d > lat,46.000000,57.000000 -d lon,3.000000,17.000000 -d time,0,2401 > /Datasets/cmap/std/precip.pentad.mean.nc > /Public/www/X139.14.20.244.217.3.47.29.nc > Created by CAS 09/2012 using Version 1201 > NC_GLOBAL#platform=Analyses > > NC_GLOBAL#references=http://www.esrl.noaa.gov/psd/data/gridded/data.cmap.html > NC_GLOBAL#source=ftp ftp.cpc.ncep.noaa.gov precip/cmap/pentad > NC_GLOBAL#title=CPC Merged Analysis of Precipitation Pentad data (excludes > NCEP Reanalysis I) > NC_GLOBAL#Version=V1201 > precip#actual_range={ 0, 25.07 } > precip#add_offset=0 > precip#dataset=CPC Merged Analysis of Precipitation Standard > precip#least_significant_digit=2 > precip#level_desc=Surface > precip#long_name=Average Pentad Rate of Precipitation > precip#missing_value=-9.96921e+36 > precip#parent_stat=Mean > precip#precision=2 > precip#scale_factor=1 > precip#statistic=Pentad Mean > precip#units=mm/day > precip#valid_range={ 0, 250 } > precip#var_desc=Precipitation > time#actual_range={ 1569072, 1857384 } > time#avg_period=0000-01-00 00:00:00 > time#axis=T > time#delta_t=0000-00-05 00:00:00 > time#long_name=Time > time#standard_name=time > time#units=hours since 1800-01-01 00:00:0.0 > Corner Coordinates: > Upper Left ( 2.5000000, 57.5000000) > Lower Left ( 2.5000000, 45.0000000) > Upper Right ( 17.5000000, 57.5000000) > Lower Right ( 17.5000000, 45.0000000) > Center ( 10.0000000, 51.2500000) > Band 1 Block=6x1 Type=Float32, ColorInterp=Undefined > NoData Value=-9.96920996838686905e+36 > Metadata: > actual_range={ 0, 25.07 } > add_offset=0 > dataset=CPC Merged Analysis of Precipitation Standard > least_significant_digit=2 > level_desc=Surface > long_name=Average Pentad Rate of Precipitation > missing_value=-9.96921e+36 > NETCDF_DIMENSION_time=1569072 > NETCDF_time_units=hours since 1800-01-01 00:00:0.0 > NETCDF_VARNAME=precip > parent_stat=Mean > precision=2 > scale_factor=1 > statistic=Pentad Mean > units=mm/day > valid_range={ 0, 250 } > var_desc=Precipitation > > And the next bands following. > --- > Here is the metadata: > --- > > > Metadata for /Public/www/X139.14.20.244.217.3.47.29.nc > Dimensions: > > time 2402 > lat 5 > lon 6 > precip 2402 5 6 > > Variables: > > time > > long_name Time > avg_period 0000-01-00 00:00:00 > axis T > standard_name time > delta_t 0000-00-05 00:00:00 > actual_range 1979-01-01 00:00:00 2011-11-22 > 00:00:00 > units hours since 1800-01-01 00:00:0.0 > lat > > long_name Latitude > axis Y > standard_name latitude > actual_range 56.25 46.25 > units degrees_north > lon > > long_name Longitude > axis X > standard_name longitude > actual_range 3.75 16.25 > units degrees_east > precip > > parent_stat Mean > long_name Average Pentad Rate of Precipitation > valid_range 0 250 > least_significant_digit 2 > level_desc Surface > dataset CPC Merged Analysis of Precipitation > Standard > missing_value -9.96920996838687e+36 > statistic Pentad Mean > actual_range 0 25.0699996948242 > var_desc Precipitation > add_offset 0 > precision 2 > units mm/day > scale_factor 1 > > Global Attributes: > > source > ftp ftp.cpc.ncep.noaa.gov precip/cmap/pentad > > Version > V1201 > > history > Tue Aug 6 03:47:30 2013: ncks -O -d lat,46.000000,57.000000 -d > lon,3.000000,17.000000 -d time,0,2401 > /Datasets/cmap/std/precip.pentad.mean.nc > /Public/www/X139.14.20.244.217.3.47.29.nc Created by CAS 09/2012 using > Version 1201 > > references > http://www.esrl.noaa.gov/psd/data/gridded/data.cmap.html > > documentation > http://www.esrl.noaa.gov/psd/data/gridded/data.cmap.html > > platform > Analyses > > title > CPC Merged Analysis of Precipitation Pentad data (excludes NCEP > Reanalysis I) > > Conventions > COARDS > --- > > Any advise on how to proceed to create rasters and timelines from this would > be very appreciated. Probably something obvious I do not see. > > Thanks, > > Gunnar > > > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
