# Sum a field in buffer intersection

I have looked and do not see this answered in any other discussions.

Purpose: Site suitability analysis for brewers spent grain processing facility

Method: Locate intersecting buffers with greatest amount of spent grain - need field to sum barrels based on intersections (ex. Mountain Brewing Co. produces 3,000 barrels a year and Sierra Nevada produces 800,000 barrels a year - if the radii from the two breweries intersects the intersection would have a sum of 803,000 a year)

Using ArcMap 10.1, I have one shapefile that I have a 15 mile radius around each point (brewery). I am trying to identify all intersecting buffers by summing a specific field. I would eventually like for the intersections with the greatest number to be a 3D representation of barrels per year based on the sum field (I don't think I can do this in ArcMap 10.1 but need to transfer everything over to ArcScene, but I'm hoping not).

• Could you go into more detail about what you have tried and what isn't working for you? This question looks like a homework question and that's generally frowned upon here. If you could provide additional information and what you have done, it may encourage others to help you. – GISKid Aug 5 '14 at 14:35
• I am doing this for an internship but will turn in as a project for class. I already have a project I can turn in-- create buffers and identified sites at intersections-- but I wanted to make it even better-- it is outside the scope of what is covered in our class. I have tried union buffers, intersect buffers converting buffer polygons to points to do a count. – Amy Aug 5 '14 at 15:02

2. Run the Find Identical tool on the output from the Union tool, using only `SHAPE` as the categorization field.
3. Join the output table from Find Identical back to the Union output's `OBJECTID` field by `IN_FID`.
4. Use the Dissolve tool to dissolve by the joined `FEAT_SEQ` field (created by Find Identical), adding the sum of your barrel production field as a statistic.