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Assigning each Polygon to a Larger One

Question asked by winikoff.justin on Oct 27, 2016
Latest reply on Oct 27, 2016 by cdspatial

Hello. Forgive me if this really simple I don't really know arcGIS much at all. I have a 2 shapefiles of polygons. One is each US county. Another is electrical grid regions. The grid regions vary across sate and in some cases county. What I would like to do is assign each county a majority grid. For example, if a county is 20% grid 1 and 80% grid 2, I would like a variable for that county Grid==2. If another county is entirely in grid 6, I would like a variable Grid==6. Can anyone help me do this? I really don't know how to do much in GIS. Thanks. I've attached a picture of the grids (different colors) with county borders if that helps you understand what I'm trying to do.