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create outer lines from polygon

  • January 24, 2020
  • 2 replies
  • 382 views

Hi all,

 

 

I try to redefine the outer boundaries of the red and green polygons. As you can see in the picture, they are not up-to-date anymore. However, I have tried different transformers, in different order like GeometryCoercer, LineOnLine Overlayer and a clipper, but the outcome is everytime a mess of lines criss-crossing (second picture), Basically I want to get rid of everything on the 'inside' and just keep the outer boundary of both red and green (or in-and outside of green ofcourse, but then I have another problem with different symbology on both sides...). I don't need any of the attributes, just the geometry will do. I am relatively new to FME, any help much appreciated!

 

 

Thanks.

 

 

Best answer by erik_jan

The Dissolver transformer will create the outer polygon (do not create holes/donuts).

Then the GeometryCoercer can convert the polygon to the outer boundary line.

Hope this helps.

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2 replies

erik_jan
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  • Contributor
  • Best Answer
  • January 24, 2020

The Dissolver transformer will create the outer polygon (do not create holes/donuts).

Then the GeometryCoercer can convert the polygon to the outer boundary line.

Hope this helps.


  • Author
  • January 27, 2020

Yes it works! Thank you very much!


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