Andrea, Thanks a lot for your help. Regards. On Sun, Mar 6, 2022 at 5:49 AM Andrea Giudiceandrea via Qgis-user < qgis-user@lists.osgeo.org> wrote:
> *krishna Ayyala* > *Sat Mar 5 22:06:54 PST 2022* > ------------------------------ > > Nicolas, I ran the Drape tool as shown below. It resulted in a new line > feature called "Draped" and added to my map. But this new feature has > exactly same attributes as that of "Lines" feature. i.e. it does not have > any new field such as Z added to the attribute table. > > > Hi krishna Ayyala, > please read the tool documentation at > https://docs.qgis.org/3.22/en/docs/user_manual/processing_algs/qgis/vectorgeometry.html#qgissetzfromraster > > As written in the documentation, the "Drape" tool does not add a new field > with the Z coordinate value to the attribute table. It adds the Z > coordinate value to each vertex in each feature geometry of the vector > layer overlapping the raster layer. > > In general, if you need to copy the Z coordinate value of the feature > geometry in a field of the attribute table, you can use the "Extract Z > values" tool with the layer containing the feature geometries with vertices > that have the Z coordinate value. > > Anyway, consider that a line type feature geometry is made by more than > one vertex, and that the "Extract Z values" tool stores only one value for > each input feature, so if you want to store the Z coordinate value for each > vertex of each line type feature geometry in a field of the attribute > table, then you would probably need to first extract the vertices of the > line layer to a point layer and after that extract the Z value of each > point. > > Alternatively you could use the field calculator to perform more complex > different calculation, or you could afterward perform other data processing > such as e.g. aggregate the Z values of the vertices of each input line > feature. > > Regards. > > Andrea > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >
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