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Removing unnecessary polygon features

Question asked by pmoth on Nov 17, 2014
Latest reply on Nov 18, 2014 by pmoth

Hi Everyone - I'm working with a shapefile and ultimately want to remove all excess features that do not offer any unique coverage. My shapefile has several features stacked on top of each other and want to achieve the most amount of coverage while using the least amount of features possible. I ideally want to identify and erase the oldest, hence leaving single layer coverage of the newest strips. Any ideas how to do this without manually selecting and erasing the oldest features?