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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!

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.

 

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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