3D tools for QGIS: DEM to OBJ/STL mesh, vector extrusion, elevation profile, LAS/LAZ point cloud filtering, and 3D scene viewer.
GeoRaster3D provides five 3D analysis tools: (1) Export DEM raster to OBJ and STL 3D mesh with Z-exaggeration and decimation. (2) Extrude 2D polygons (buildings) to 3D OBJ and PolygonZ Shapefile using a height attribute. (3) Extract elevation profiles along a line layer using a DEM, with CSV and PointZ Shapefile output plus matplotlib chart. (4) Load, inspect and filter LAS/LAZ point clouds by Z range, intensity and classification, with LAS and CSV output (requires laspy). (5) Configure and open a native QGIS 3D scene with DEM terrain, camera controls and solar lighting.
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