I know pretty much nothing about GIS. I'm learning as I go on arcgis.
I have a shapefile of US counties for which I have calculated the county area in square miles (called CountySize). I also have a shapefile with wind potential (calculated as WPC, ranging from 1-7) with many polygons (with area=AREA).
How can I calculate the percentage of every county that is taken up by wind potential areas greater than 3?
If a county has 20% of its surface covered by polygons with WPC=4 and 30% with polygons with WPC=5, the percentage=50%. If it entirely covered by WPC=2, then percentage=0.
I tried using intersect for the first question and I'm not fully sure whether this is what I want to do.