On Mon, Apr 14, 2014 at 3:31 PM, Steve Friedman <[email protected]> wrote:
> Yes I know that netcdf files store arrays of data and that each us treated > as a subset of the main file. > > This is not a case for raster calculator. NIR is it a case requiring a > hydrological plugin. > > In ArcGis, which is no longer available to me, I used a built in tool to > overlay the raster vegetation map with the netcdf shape file representing > the hydrological metric of interest. > netcdf shape file? Never heard of such a thing - QGIS and GDAL only support netcdf *raster* files. cheers Etienne > Perhaps extracting each metric to its own file will yield a reasonable > method. > > Thanks > > On Apr 14, 2014 1:57 PM, "Etienne Tourigny" <[email protected]> > wrote: > > > > You should use the raster calculator to do any calculations on rasters, > or some of the tools in processing. But your use case seems a bit > complicated - perhaps there is a hydrological plugin or processing > algorithm that can help. > > > > Have you tried loading the file in QGIS? > > > > But be aware that netcdf files with many variables are a bit tricky - > each variable is a subdataset, which is treated as a separate file. See the > gdal netcdf page for more details [1]. > > > > You could translate them to individual files in another format like > gtiff using gdal: > > > > gdal_translate -of gtiff -sds in.nc out > > > > > > [1] http://www.gdal.org/frmt_netcdf.html > > > > > > > > On Mon, Apr 14, 2014 at 1:28 PM, Steve Friedman <[email protected]> > wrote: > >> > >> No. The Netcdf file has 20+ variables. It is a spatially explicit data > for hydrological metrics in a large wetland. I want to associate these > variables with a vegetation map of the same area. Then I will conduct a > GLM multinomial statistical analysis to derive probabilities of vegetation > community based on the spatial distribution of the hydrologic metrics. > >> > >> Hope that make the problem clearer. If not let me know and I'll try to > make it more explicit. > >> > >> Thanks > >> Steve > >> > >> On Apr 14, 2014 10:58 AM, "Etienne Tourigny" <[email protected]> > wrote: > >>> > >>> I don't understand what you mean. You have a netcdf file with 1 > variable that has 20+ attributes, and you want to copy them to another > raster as metadata? What is the format of your raster? > >>> > >>> > >>> On Mon, Apr 14, 2014 at 9:07 AM, Steve Friedman <[email protected]> > wrote: > >>>> > >>>> Hello > >>>> > >>>> I have a netcdf file with 20+ attributes that I need to link to a > raster layer. > >>>> > >>>> I do not see a method for this. I am hoping that I have just missed > something obvious. > >>>> > >>>> Can someone point me in the right direction. > >>>> > >>>> Thank you > >>>> Steve > >>>> > >>>> _______________________________________________ > >>>> Qgis-user mailing list > >>>> [email protected] > >>>> http://lists.osgeo.org/mailman/listinfo/qgis-user > >>> > >>> > > >
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