Click on any state in this map of the USA to learn what we have available for that state. If your browser does not support this feature, a text-only list of states and metropolitan statistical areas (MSAs) are available.

Essential's GIS project was started in 1991 to examine government databases to study social problems. Several studies have been completed to date. We hope to provide them online in the near future.

If you are interested in finding out more about GIS, look at this list of other GIS resources on the World Wide Web. It is a little outdated at the moment, so any additions or changes would be greatly appreciated.