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

[Etienne Tourigny]

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