Is there a data entity that would correspond to population clusters within a zip code tabulation area? Something that would correspond, even if only roughly, with a neighborhood or housing tract or section of a town?
I understand that the zipcode defines a postal route and that the zipcode tabulation area was a concession to the lay people who rely upon zipcodes and that with my question it's like I'm asking for a fish sandwich at a pizza shop. But we're constantly being sent company employee databases with home zipcodes only (not full home addresses) and we have to do an analysis to see how well their employee population is served by our provider network. How far do they have to travel to see a particular kind of provider? So we need some way (in the absence of street addresses) to identify where in a given zipcode people are likely to live, so we can compute distances to provider office locations from non-random starting points other than the zipcode centroid.
