arithmetic operation of point fetures over raster cell area

BrettBonner

I have a raster file with a human population count for each raster cell.

I have another layer with x,y,z vector point features.

I want to sum the z values of all point features that lie within each raster cell area, and divide that sum by the human population value in the raster cell. Ultimately I want to map z-per-capita.

How should I approach this exercise and what tools should I use within my evaluation copy of ArcMap 10.3? I am new to GIS and the learning curve for ArcGIS is immense, so I hope my question makes sense.

If there is a tutorial guide or video with a roughly similar operation, please let me know.

BrettBonner

This is what I ended up performing:

I created a fishnet to the extents and according to the cell size of the raster, and converted the fishnet to polygons.

Then I converted the raster to point feature centroids.

Next, I used a spatial join to join the point feature centroids and also the sum of point features within the polygons created from the fishnet.

Finally, using the attribute table I created a new field and simply divided by the once-raster values column by the point feature sum column. Voila I have performed arithmetic using raster z-values.