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I have a shapefile of tornado warning polygons. I would like to find and map the areas that have been in the most amount of warnings in that period of time. For example, I would be able to see that x location has been included in 4 tornado warnings in the last 7 years. How would I do this?

merged by PolyGeo Apr 23 '18 at 4:12

This question was merged with Counting overlapping polygons from one Shapefile using ArcGIS Desktop? because it is an exact duplicate of that question.