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Create 3d donut polygon with an incline of 1.2 percent from center to edge?

  • 25 November 2022
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I'm trying to Create 3d polygon with a center polygon and a buffer around it, I need to have an incline of 1.2 percent from the center polygon towards the edge of the "buffer".

Hope someone can help, and thanks in advance.

 

I've come this far, but I'm missing something:

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Best answer by caracadrian 28 November 2022, 07:44

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This looks airport related (Area 2b+c maybe)😁

I don't think FME is the right choice for this.

Firstly, you cannot create a 3d donut polygon (not in FME's naming scheme), it must be a mesh or composite surface.

If you want to use FME this is the way:

Bufferer->3DForcer (by original elevation + 0.012*buffer value).

Original feature + 3Dforced buffer to Breaklines port of SurfaceModeller (output Triangles) -> Clippee port of Clipper and original Feature to Clipper port (Outside port) -> Triangulator (TIN Surface output port) -> MeshMerger.

3D donut mesh

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Indeed it is.

Thank you so much for the response.

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