Skip to main content
Question

Spatially subtracting one feature from another

  • November 22, 2016
  • 3 replies
  • 20 views

Hi I have a feature class containing two features in a polygon; one feature inside the other. I want to subtract smaller feature from the larger so that I am left with the boundary of the larger feature without the smaller one.

3 replies

erik_jan
Contributor
Forum|alt.badge.img+17
  • Contributor
  • November 22, 2016

Have a look at the DonutBuilder transformer


david_r
Celebrity
  • November 22, 2016

Depending on how I interpret your question, you may also want to consider the Dissolver transformer.


mark2atsafe
Safer
Forum|alt.badge.img+44
  • Safer
  • November 22, 2016

I would think the Clipper is the transformer to use here. The smaller polygon is the Clipper feature, the larger polygon is the Clippee. It will do a cookie cutter operation to remove the smaller polygon from the larger.

There is an example online here: https://knowledge.safe.com/articles/28774/generating-polygon-differences.html

It's part of our FME and GIS Operations tutorial, and there are other parts of that which you might find useful. The starting page is here: https://knowledge.safe.com/articles/27998/tutorial-common-gis-operations.html


Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

 
Cookie settings