My mistake. The shape file is the raster vegetation map and the netcdf file contains the hydrological metrics. Sorry for the confusion.
Thank you for the help. Steve On Apr 14, 2014 4:34 PM, "Etienne Tourigny" <[email protected]> wrote: > > > > 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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