The Illinois State Geological Survey's typed field notes in the map library have been scanned as part of the National Geological and Geophysical Data Preservation Program (NGGDPP). Nearly 70,000 pages in 170 volumes covering Illinois and nearby states are available digitally. In addition, precise locations from each page have been entered into a database so that notes can be discovered and viewed spatially using GIS. There are about 100,000 location references (about 75,000 distinct locations).