That's what map data are, locations with data attached to them. If we choose a location, we have access to all of that other data associated with that location. It can be anything. You can map voter behavior, pollution information. You name it.
Graduate students see the possibilities.
Ryznar has taught GIS to public health specialists, political scientists, archae-ologists, environmental engineers, as well as planners. Ryznar says researchers can use GIS to look at large amounts of infor-mation about a single place over time. Of course, we've known that for a long time. In fact, the University of Michigan's department was closed down around 1980. In my case, I needed to use it as a tool.