topic Re: Editing and dissolving polygons in ArcMap in Data Management Questions

Editing and dissolving polygons in ArcMap

MarioBurrola — Tue, 23 Aug 2011 17:37:44 GMT

Hi,

I been working with a feature class that contains multiple polygons or areas, and I need to combine them into a single one.

I am using the dissolve tool but it keeps failing to dissolve the the polygons in the feature class.

Mario

Re: Editing and dissolving polygons in ArcMap

DanLee — Mon, 29 Aug 2011 20:05:44 GMT

Have you used the Check Geometry tool to see if the data has any invalid geometry? Then you can run Repair Geometry tool to fix any bad geometry.

Otherwise, could you describe a bit more - how it fails, does it work on a small selection, etc.? Or could you post the repro data?

Thanks,

Re: Editing and dissolving polygons in ArcMap

TimothyTresohlavy — Fri, 02 Sep 2011 14:09:12 GMT

Start Editing > Select All > Merge. This will 'collapse' multiple features into one, regardless of whether they intersect, overlap, etc.

Try it with a copy of your data first to ensure that its doing what you want.

There is also Union, which will create a new feature that represents all selected features collapsed into one.