Question

How to build polygons from lines?

Forum|Forum|10 years ago
December 1, 2015
2 replies
771 views

+13

tono
Supporter

Hello,

I am trying to build some polygons from lines that match in nodes and are already closed.

As I try with AreaBuilder transformer i get some polygons, but in that ones that a line shares the boundary of two expected polygons only one polygon is created. Is there anyway to build polygons from shared lines?

Example: In the image you can see how two expected polygons were not drawn.

Thanks in advance!

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+2

jpvo
Contributor
Forum|Forum|10 years ago
December 1, 2015

Hi tono,

I can see some reasons why you areas don't build.

Your lines are not topologically connected. you can use the Snapping parameter to specify a tolerance
your lines are not properly split at intersections. You can use an intersector prior to the Area builder
Make sure you are creating donuts

FME can build polygons from shared lines, good luck.

.JP