[GIS] How to combine (join?) two overlapping polygons to determine combined area they cover

arcgis-10.0arcgis-desktopareamergepolygon

How do I combine (join?) two overlapping polygons to determine the combined area they cover in ArcGIS 10?

I am sure the Geoprocessing tools can do it, but just how eludes me.

Best Answer

You're looking for the Dissolve tool - if all of your polygons are in the same featureclass/layer just run it and then use the Field Calculator to determine the area.

If your polygons are in different featureclasses, run the Merge or Append tool first.

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