topic Re: Polygon substraction in Data Management Questions

Polygon substraction

VivekRatan — Mon, 03 Jun 2013 16:30:14 GMT

Hi friends,

I have got two polygon features both are different layers.But one polygon is smaller than other and lies inside it.I want to deduct the shape of smaller polygon from bigger polygon.Its just opposite of clip function.i tried this.please help

Vivek

Re: Polygon substraction

ScottMoyer — Mon, 03 Jun 2013 19:30:34 GMT

You want to use the Erase tool. The larger polygons will be the 'Input' and the smaller the 'Erase Feature'.
Scott

Re: Polygon substraction

VivekRatan — Tue, 04 Jun 2013 15:40:56 GMT

You want to use the Erase tool. The larger polygons will be the 'Input' and the smaller the 'Erase Feature'.
Scott

Please tell me where can i find this tool in arcgis 10.thanks

Re: Polygon substraction

ScottMoyer — Tue, 04 Jun 2013 16:46:08 GMT

I have it in the toolbox of ArcCatalog: Analysis Tools>Overlay>Erase. If you don't have erase (if you have a limited license) you can Union (same location as Erase) the two feature classes and then delete the inner polygons by selecting them based on a unique identying field that existed in the inner polygons before the Union. You may need to create that unique field firstly and populate it with identifying data.
Scott

Re: Polygon substraction

VivekRatan — Fri, 07 Jun 2013 16:45:18 GMT

I have it in the toolbox of ArcCatalog: Analysis Tools>Overlay>Erase. If you don't have erase (if you have a limited license) you can Union (same location as Erase) the two feature classes and then delete the inner polygons by selecting them based on a unique identying field that existed in the inner polygons before the Union. You may need to create that unique field firstly and populate it with identifying data.
Scott

Thank you Sott.I a m able to use erase tool.it works.