Just tried a few datasets in 3d faces and they triangulate beautifully in 3.16. For some reason need to import from dwg instead of dxf, or re-export to gpkg before the tool will let me use the intrinsic z data, but really works very nicely.
Michael Dufty From: Qgis-user <qgis-user-boun...@lists.osgeo.org> On Behalf Of Kirk Schmidt Sent: Friday, 18 December 2020 9:41 PM To: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Volume calculation - Reg Hi Mike: I usually convert the contours or breaklines into a point layer and then generate a dem from that. This is not a precise methodology but it would depend on what you are trying to do and the precision of the underlying data. Kirk Schmidt
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