Offers elevation maps. The elevation data was derived from contour maps elsewhere, some is available from the USGS. Actual satellite images are also available on this site.
Includes Indiana biofuels map, coal mine map, and a historical aerial map, among others. From the Indiana Geological Survey, a research institute of Indiana University.
IU Bloomington Library website linking to congressional serial set map, Indiana Census maps, road maps, Sanborn Fire Insurance maps, and other historical maps.
A US government resource The National Map includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover.