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I want to smooth my polygons - not reduce them to triangles

  • May 19, 2016
  • 1 reply
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What I have: a set of shapefiles with polygons. (I also have a fmw that worked well in 2016.0. I have since upgraded to FME 2016.1)

What I want: These polygons are vertex heavy (>500 pts for a rectangle), and I am going to smooth them (down to a dozen or less vertexes) as well as write them in 2D only.

What I did: I added a [2DForcer] and a [Generalizer].

What I experience: Using Douglas (Tolerance = 0) there is no effect. Using Douglas (Tolerance >= 1) will have my rectangles reduced to triangles. I also tried with other algorithms, with variations of unexpected geometry degenerations.

My question is simply a "what is it I don't see?", as in the past version of FME this worked fine.

Douglas, Tolerance = 0

Douglas, Tolerance >= 1

 

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1 reply

jdh
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  • jdhContributor
  • Contributor
  • May 19, 2016

You don't have a coordinate system defined, and your coordinates are much closer together than 1 (unknown unit). Try generalizing with 0.0005.

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