Question

Problem with point cloud interpolation

  • 23 August 2013
  • 4 replies
  • 8 views
G
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Hello,

 

 

I am creating some 3D PDFs using a .xyz point cloud file.

 

The thing is one of the files have a great area without data, so when FME interpolates the point cloud to generate the TIN this area is also being taken and my PDF is getting a strange result for this area.

 

I tried to clip the area without any point cloud value but it didn't worked.

 

What I need to do is figure it out a way to clip the point cloud bounding box area so when the TIN is generated it will only interpolate the values where I have point cloud data.

 

Anyone have an idea if this is possible?

 

 

Thanks,

 

Gabriel

4 replies

G
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I need to interpolate only the area with points on the left, but I am getting the result on the right with interpolation in the void area.

 

fmelizard
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Userlevel 4
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Hi,

 

 

I would try to clip the TIN with the hull of the point clouds instead.

 

I suspect that the TIN generator will interpolate in the TIN within the point cloud bounding box, so eliminating the void area will still result in the same bounding box of the data and therefore the same TIN.

 

G
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Yeah, the solution I found was clipping the TIN and not the point cloud.

 

I used this script on a FME article since the Clipper transformer doesn't work with TIN surfaces.

 

http://fmepedia.safe.com/articles/How_To/How-to-clip-TIN-Surfaces

Thanks,

 

Gabriel
fmelizard
Rank
Userlevel 4
Badge +13
Good to know about this workaround 

 

cheers,

 

Itay

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