Hello,

I have a population point shapefile and I am trying to divide the population value of the point by the number of points surrounding it (in a different point shapefile). For example, if a population point has a value of 10, and there are 20 points surrounding the population point, then each of those would have a new value of 0.5. Does anybody know a tool or group of tools that will accomplish this?

Thanks.

If you have access to an Advanced license you can use the Near tool. ArcGIS Help (10.2, 10.2.1, and 10.2.2)

You would use the surrounding points as input features and the population points as near features.

This will add information to you surrounding points about the population point that is nearest (field NEAR_FID). Next you could summarize on that field to get the number of surrounding points located near a population point. Join this number and the population to the surrounding points and divide the population by the number of points.

If you don't have access to an advanced license, you could use a spatial join. ArcGIS Help (10.2, 10.2.1, and 10.2.2)