Monday, 16 February 2015

Extract boundary from detailed layers in ArcGIS Desktop or QGIS?


Is it possible to return the boundary (outside) perimeter of a polygon layer?


Let's say you have the map of the USA, for simplicity, broken down to the county level, is it possible to return the boundary map of the whole country from that map?



Answer



You can just do a dissolve on the county layer (be sure to have just the counties you want to dissolve selected).


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