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I want to create LOD2 objects from LAS file.

As input i only have 2D buildings as polygons, representing boundary of building, with no roof-ridges or other roof details, only polygons (without elevation)

I want to create roof-ridges and roof surfaces.

How do I use FME to make areas to represent roof sides? So i need the maximum and minimum elevation inside the boundary but how to do to make roof sides ?

I used a clipper between las and boundary and after a pointcloudcalculator but after i use a geometryreplacer i don't understand all geometries exit rejected why ?

And after it's necessary to use 3d Forcer, i need help !!

Thank you

Nat

Hi @npleuchot,

I think the procedure described in the following article will get you the results you desire from the point cloud and building outlines:

Point Cloud to 3D Terrain Model with Buildings

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