I am summarizing some population data using a 1km raster overlay. I converted population data, polygon layer, into a 25-meter raster that contains the value for population/m^2. That value is then multiplied by 625 m^2 (the area of each cell), then I figured that I could do a zonal summary using my 1km raster layer (which is snapped nicely to the 25-meter raster layer), but now I am stuck. If I could just add up the values of each 25-meter cell that occurs in a 1-km cell then I would only need to multiply by 625 to get the approximate total population in that cell... I could use a majority resample but this should give a better estimate.
I got some great advice on coding a solution, but I'd like to figure it out along this line of thinking if possible.