I have a hospital point shapefile in a state and would like to create a raster map based on these hospitals. What I would like to have is a map that each cell has a value of accessibility, the accessibility value need to be based on distance to the nearest hospital, for example, value 1 means distance less than 3 miles, and 2 for 3-10 miles and 3 for 10 miles and longer, so that when adding patients data to the map, I will get a accessibility value for each patient. It's just like the service area map, but I don't have network dataset.
Could anyone give me some suggestions or advice on that? Thanks a lot!