[gdal-dev] VRT file from NetCDF

[Yves Jacolin]

Hello,

Etienne asked some question offlist so I investigate.

gdal create relatif path by default (I don't see a flag to change this). 
MapServer and QGIS don't like this.

After changing relatif path to absolute path both are working correctly.

Thanks,

Y.

Le mardi 13 décembre 2011 15:37:24, Yves Jacolin a écrit :
> Hello,
> 
> I have no enought time to find the reason of the issue but I think the
> problem come from QGIS which can't classify raster data correctly. Or I am
> wrong somewhere.
> 
> Anyway, I finally successfully worked on my NetCDF data using gdalbuildvrt
> and -separate flag.
> 
> Thanks again both of you,
> 
> Y.
> 
> Le mardi 13 décembre 2011 13:33:53, Etienne Tourigny a écrit :
> > Yves, just out of curiosity, which gdal version are you using?  You
> > might consider trying the dev version (1.9) as the netcdf driver has a
> > quite a few fixes.
> > 
> > Please also send me the netcdf and vrt file (or post them somewhere).
> > 
> > Etienne
> > 
> > On Tue, Dec 13, 2011 at 10:21 AM, Yves Jacolin <yjacolin at free.fr> wrote:
> > > Le mardi 13 décembre 2011 13:01:24, Even Rouault a écrit :
> > >> Selon Yves Jacolin <yjacolin at free.fr>:
> > >> > Hello,
> > >> > 
> > >> > I am trying to create vrt files from netcdf files using only one
> > >> > subdataset. FYI, the second step will be to create a vrt file with
> > >> > two bandes linked to two
> > >> > subdataset.
> > >> > 
> > >> > I am using a first vrt file for begining created from a tif file as
> > >> > template. The
> > >> > vrt file using tif file is working correctly. The tiff file has been
> > >> > created by
> > >> > gdal_translate from the netcdf file.
> > >> > 
> > >> > If I try to open the vrt file linked to netcdf file in QGIS no data
> > >> > is dispaly,
> > >> > values are null for all the dataset. QGIS medatada says "no data
> > >> > value".
> > >> > 
> > >> > Any idea?
> > >> 
> > >> Yves,
> > >> 
> > >> did you try to create the VRT with "gdal_translate -of VRT
> > >> netCDF:xxxxx netcdf.vrt" and see if it shows up correctly in QGIS (it
> > >> should...). ? Then you can compare with the VRT you've created at
> > >> hand.
> > > 
> > > Even,
> > > 
> > > I tested and compared both files and they are similar (except that with
> > > gdal_translate I have Metadata tags). Both are not working in QGIS: no
> > > value in dataset! Translating into GTIFF is working but I want to keep
> > > vrt files to working on them with MapServer.
> > > 
> > > I can send you netcdf and vrt file if you want to test it.
> > > 
> > > Thanks,
> > > 
> > > Y.
> > > --
> > > Yves Jacolin
> > > 
> > > http://yjacolin.gloobe.org
> > > _______________________________________________
> > > gdal-dev mailing list
> > > gdal-dev at lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/gdal-dev

-- 
Yves Jacolin

http://yjacolin.gloobe.org