Hi, I find that the best way to do this is to smooth the raster before extracting the contour lines. I guess the generalize plugin does not handle the z in the shape files and therefore save the shp as a 2D file. Grass has good options for generating contour lines and much of the noise can be reduced using the Grass options.
Nicolas > Le 18 juill. 2018 à 19:09, Andrew Davies <[email protected]> a > écrit : > > I am losing the Z axis on contour lines when smoothing or removing small > objects using the generalize plug in. This also happens when smoothing or > simplifying geometry. > > My workflow is to extract contours from DroneDeploy, Then smooth and remove > small objects in QGIS then save as a DXF and open in ACAD. When opening in > ACAD there is no z axis on the contours after smoothing. If the lines are > extracted from drone deploy and not tampered with the Z axis remains intact > when exported to a DXF and opened in ACAD. > > I believe because it's moving the contour lines when smoothing, it's deleting > the z axis data. Is there a way to keep this data intact? > > This is my first post on the mail list so I apologize if my description is > lacking information. > > Thank you very much. > _______________________________________________ > Qgis-user mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
