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 <[email protected]> wrote: > > Le mardi 13 décembre 2011 13:01:24, Even Rouault a écrit : > >> Selon Yves Jacolin <[email protected]>: > >> > 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 > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Yves Jacolin http://yjacolin.gloobe.org _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
