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I am trying to perform a density analysis of a point shapefile on ArcMap. I am unsure of what to insert for population field. I've tried the actual number of people in the census tract where my point is and also tried adding a column to insert count (of points), so that each point has a count of 1. I have also left it as None. Neither works.

I get 2 types of errors:

  1. all input points are identical
  2. errors in executing grid expression
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    I believe you should either be using the point density tool. Either that or grid your map with a fishline, join points to the grids summing the points, and then run kernel density with the population field being the newly created count field in the joined layer. – ed.hank Nov 30 '15 at 15:51
  • Thank you, I didn't know I had to add a fishline, that was very helpful. – Elisa Pineda Dec 2 '15 at 20:47