I have a set of points and a population grid that is a raster file (http://sedac.ciesin.columbia.edu/data/set/gpw-v3-population-density-future-estimates/data-download). I am trying to solve how many population are within 50km, 100km, 200km, and 500km distance away from each point.
I first converted the population raster to polygon so that I could use buffer and intersect tools; however, I realized doing so loses a lot of accuracy and a significant number of population was lost from the process.
After this failed attempt, I used zonal statistics on the buffered areas. But I realized that the buffered zones overlap when the distance goes over 100km, which cause some of the data to get lost.
Ultimately, I want to calculate how many people are living within certain distances from each point by using raster population data.
Does anyone know a way around this?