Hello Francesco, What type of data is the junctions layer?
Is it a vector layer with points? You want to attribute a evelation to each of the points? If it is, you are not using the correct tool. In the plugins, search for a plugin called point sample. That's what you need. Good luck, Alexandre Neto Em 17/10/2014 15:16, "Francesco Liva" <[email protected]> escreveu: > Hi > I am not an expert QGIS user, I have downloaded a map from USGS, have > created a raster file with Raster > Extraction > Clipper. > In a layer called *Junctions* I want to add elevations automatically > from this raster file, by Plugins > Raster interpolation. It seems it is > working, there is a message saying that the data have been updated. But in > reality no data is updated and the following error message appears: > > Traceback (most recent call last): > File > "/Users/francescoliva/.qgis2/python/plugins/rasterinterpolation/qgiscombomanager/layercombo.py", > line 102, in __canvasLayersChanged > for layerId, layer in > QgsMapLayerRegistry.instance().mapLayers().iteritems(): > AttributeError: 'NoneType' object has no attribute 'instance' > > Moreover When I open the Plugins > Raster interpolation, the window is > not showing all layers, one layer called Junctions_3 is not appearing. > > Can you help me, thankyou > > Best Regards > Francesco Liva > > ______________________________ > 27, Triq Ix-Xatt, Kalkara, Malta > ☎ +356 99 38 01 68 mobile > ☎ +356 27 32 76 78 home > > > > > > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user >
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