[Qgis-user] Can I open NetCDF files with QGIS?

Wed Feb 8 12:20:45 PST 2012

Etienne,

I don't think so as my netcdf have several subdataset. I have a windows pop up 
which allow me to choose the subdataset.

Y.
Le mercredi 8 février 2012 20:55:20, Etienne Tourigny a écrit :
> QGis can open a netcdf file which has only 1 variable (along with
> supporting lat/lon or X/Y dimension variables).
> Perhaps that is what works for you?
> 
> Etienne
> 
> On Wed, Feb 8, 2012 at 5:42 PM, Yves Jacolin (free) <yjacolin at free.fr> 
wrote:
> > Hello,
> > 
> > I successfully did it. But my email won't help you as I don't know why. I
> > guess my gdal binaries from my company has something specific.
> > 
> > Y.
> > 
> > Le mercredi 8 février 2012 19:59:06, Etienne Tourigny a écrit :
> >> It seems that QGis does not support GDAL raster "subdatasets", I get
> >> this with netcdf and hdf4  files.
> >> 
> >> Try this:
> >> 
> >> gdal_translate -of vrt NETCDF:"Glb_20111001.nc":cf_DangerRisk
> >> danger_risk.vrt qgis danger_risk.vrt
> >> 
> >> For more information on subdatasets see the GDAL netcdf driver page:
> >> http://www.gdal.org/frmt_netcdf.html
> >> 
> >> 
> >> It's a pity this doesn't work directly in QGis - anybody know if this
> >> could be fixed/implemented?
> >> It would be great to support subdatasets by adding a layer for each
> >> subdataset, and perhaps even better with a dialog for selecting a
> >> particular subdataset.
> >> 
> >> Regards,
> >> Etienne
> >> 
> >> On Wed, Feb 8, 2012 at 3:51 PM, Paolo Corti <pcorti at gmail.com> wrote:
> >> > Hi
> >> > sorry if this has been discussed before, but according to what I see
> >> > here [1] there was not an answer.
> >> > 
> >> > I need to open a NetCDF file with QGIS.
> >> > I am using QGIS 1.7.2, and GDAL 1.9.0.
> >> > I can successfully manage NetCDF files with GDAL:
> >> > 
> >> > $ gdalinfo --formats
> >> > Supported Formats:
> >> >  ...
> >> >  netCDF (rw+): Network Common Data Format
> >> >  ...
> >> > 
> >> > $ gdalinfo Glb_20111001.nc
> >> > Driver: netCDF/Network Common Data Format
> >> > Files: Glb_20111001.nc
> >> > Size is 512, 512
> >> > Coordinate System is `'
> >> > Metadata:
> >> >  NC_GLOBAL#CDI=Climate Data Interface version 1.4.3
> >> >  NC_GLOBAL#CDO=Climate Data Operators version 1.4.3
> >> > (http://www.mpimet.mpg.de/cdo)
> >> >  NC_GLOBAL#Conventions=CF-1.0
> >> >  NC_GLOBAL#history=Wed Oct 12 23:30:47 2011: cdo -s -f nc merge
> >> > af01_20111001.nc af02_20111001.nc pf01_20111001.nc pf02_20111001.nc
> >> > pf03_20111001.nc pf04_20111001.nc pf05_20111001.nc pf06_20111001.nc
> >> > pf07_20111001.nc pf08_20111001.nc pf09_20111001.nc pf10_20111001.nc
> >> > pf11_20111001.nc pf12_20111001.nc pf13_20111001.nc pf14_20111001.nc
> >> > pf15_20111001.nc pf16_20111001.nc pf17_20111001.nc pf18_20111001.nc
> >> > pf19_20111001.nc pf20_20111001.nc pf21_20111001.nc pf22_20111001.nc
> >> > pf23_20111001.nc pf24_20111001.nc pf25_20111001.nc pf26_20111001.nc
> >> > pf27_20111001.nc pf28_20111001.nc pf29_20111001.nc pf30_20111001.nc
> >> > pf31_20111001.nc pf32_20111001.nc pf33_20111001.nc pf34_20111001.nc
> >> > pf35_20111001.nc pf36_20111001.nc pf37_20111001.nc pf38_20111001.nc
> >> > pf39_20111001.nc pf40_20111001.nc pf41_20111001.nc pf42_20111001.nc
> >> > pf43_20111001.nc pf44_20111001.nc pf45_20111001.nc pf46_20111001.nc
> >> > pf47_20111001.nc pf48_20111001.nc pf49_20111001.nc pf50_20111001.nc
> >> > Glb_20111001.nc
> >> > Wed Oct 12 23:30:39 2011: cdo -s -f nc merge
> >> > pf50_20111001_DangerRisk.nc pf50_20111001_FWI.nc pf50_20111001.nc
> >> > Wed Oct 12 23:30:37 2011: cdo -s -f nc mergetime
> >> > pf50_20111001_20111001_FWI.nc pf50_20111001_20111002_FWI.nc
> >> > pf50_20111001_20111003_FWI.nc pf50_20111001_20111004_FWI.nc
> >> > pf50_20111001_20111005_FWI.nc pf50_20111001_20111006_FWI.nc
> >> > pf50_20111001_20111007_FWI.nc pf50_20111001_20111008_FWI.nc
> >> > pf50_20111001_20111009_FWI.nc pf50_20111001_20111010_FWI.nc
> >> > pf50_20111001_FWI.nc
> >> > Wed Oct 12 23:30:36 2011: cdo -s -f nc -R chname,var228,pf50_FWI -copy
> >> > Work0/20111001_fwi/pf50/20111001_20111010_FWI.grib
> >> > pf50_20111001_20111010_FWI.nc
> >> >  NC_GLOBAL#institution=European Centre for Medium-Range Weather
> >> > Forecasts Subdatasets:
> >> >  SUBDATASET_1_NAME=NETCDF:"Glb_20111001.nc":cf_DangerRisk
> >> >  SUBDATASET_1_DESC=[10x640x1280] cf_DangerRisk (32-bit floating-point)
> >> >  SUBDATASET_2_NAME=NETCDF:"Glb_20111001.nc":cf_FWI
> >> >  SUBDATASET_2_DESC=[10x640x1280] cf_FWI (32-bit floating-point)
> >> >  ...
> >> > [cut]
> >> > 
> >> > When I try to open this dataset with QGIS, this is what I get:
> >> > Cannot get GDAL raster band.
> >> > 
> >> > In the console this is what has been logged:
> >> > 
> >> > Warning: QgsRasterLayer::setDataProvider: Data provider is invalid.
> >> > ERROR 10: Pointer 'hObject' is NULL in 'GDALGetMetadata'.
> >> > 
> >> > Any ideas? Should I open a ticket?
> >> > thanks
> >> > P
> >> > 
> >> > [1] http://www.osgeo.org/pipermail/qgis-user/2011-July/012949.html
> >> > 
> >> > --
> >> > Paolo Corti
> >> > Geospatial software developer
> >> > web: http://www.paolocorti.net
> >> > twitter: @capooti
> >> > skype: capooti
> >> > _______________________________________________
> >> > Qgis-user mailing list
> >> > Qgis-user at lists.osgeo.org
> >> > http://lists.osgeo.org/mailman/listinfo/qgis-user
> >> 
> >> _______________________________________________
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> > 
> > --
> > Yves Jacolin

-- 
Yves Jacolin