[Qgis-user] Contour Smoothing Issue

[Nicolas Cadieux]

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 <tazdronesolutions at gmail.com> 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.
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