remove shared edge after the union of two polygons

Question

I have two polygons that are next to each other (left image). After performing a union of the two polygons, I have a single polygon with outlines similar to the left image. What I am looking for is a way to remove the shared edges of the two polygons, as shown on the right. I am working with arcobjects (.net) and arcdesktop 10.1. Hopefully there's a nice built-in method to achieve this. Thanks.

Left image is what I am getting after a union. Right image is what I want.

score 0 · Answer 1 · answered Jan 07 '13 at 01:56

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There is indeed a nice built-in method - you're looking for the Dissolve tool.

answered Jan 07 '13 at 01:56

Juffy

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I tried this but it didn't work for me. I realized that the edges aren't matching up exactly, there's a gap between the edges of the two polygon. – Hoang Dang Jan 14 '13 at 22:03

score 0 · Answer 2 · answered Jan 07 '13 at 12:32

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There is an example in the ArcObjects help, this may help you.

[Creating a union of several polygons] http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/d/00010000009t000000.htm

answered Jan 07 '13 at 12:32

dr pain

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Thanks, the link is how I got the union of the two polygons, but the outline of the polygon from the union still shows the outlines of each individual polygon. – Hoang Dang Jan 08 '13 at 20:52

score 0 · Accepted Answer · answered Feb 14 '13 at 04:56

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I got this to work with the Integrate tool. It merges two polygons and remove any two edges that are near each other.

answered Feb 14 '13 at 04:56

Hoang Dang

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remove shared edge after the union of two polygons

3 Answers3