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Question

Create a smooth 3d surface from a pointcloud?

  • December 4, 2018
  • 2 replies
  • 192 views
B

Hi, I wish to model railway and road surfaces by draping 2d polygons of their extents over a 3d point cloud and then make the surface completely smooth in order to generate straight contours. The first part is no problem, I have created a workbench that drapes the polygons, but I'm struggling to think of a way to achieve making the surface smooth?

The railway surface will be completely flat only sloping up and down length-ways but the roads will likely be at a slight angle. I'm thinking that there isn't a surface transformer that can accomplish this? And perhaps the best way would be to treat the 3d points that are within the polygons somehow?

Any suggestions would be greatly appreciated!

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2 replies

daveatsafe
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  • daveatsafeSafer
  • Safer
  • 1637 replies
  • December 4, 2018

Hi @boo,

I can't think of a way to smooth the surface, but FME does have tools that can smooth the resulting contours. Please have a look at the SherbendGeneralizer transformer, which is designed specifically for contour smoothing.

 

B
  • boo
  • Author
  • 1 reply
  • December 7, 2018

Hi @boo,

I can't think of a way to smooth the surface, but FME does have tools that can smooth the resulting contours. Please have a look at the SherbendGeneralizer transformer, which is designed specifically for contour smoothing.

 

Cheers Dave, that looks like a useful transformer and potentially a good workaround for the end result. Though I do need a working endpoint at points and breaklines really.

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