[postgis-users] Splitting a Polygon with a Linestring
jmbeaudoin at wisc.edu
Wed May 21 11:21:40 PDT 2008
I think the steps below will work but I have one question. I am creating
an application that allows a user to split a polygon by drawing a
linestring across the polygon they wish to change. The crossing
linestring has parts that are outside the polygon and I want to remove
that before I geomunion. What's the easiest way to do that?
- extract the lines that make up the polygon
- add to this your crossing linestring
- geomunion the lines together.
- polygonize the union-ed set
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