Lower Illinois River Valley Settlement Patterns

• Paleoindian
• Early Archaic
• Middle Archaic
• Late Archaic
• Early Woodland
• Middle Woodland
• Late Woodland
• Mississippian

1. The "N=" in the maps is currently not correct. It is based on the number of sites per county, and there for includes sites outside of the map extent.
2. The yellowish patches are the Illinois Historic Preservation Agency survey areas, as we have them digitized. These are contract surveys that are for the most part from after about 1984, and may not have been updated for the last few years, depending on the county. These should be used for comparison, not seen as fact.
3. It is easy to do cosmetic changes. I am going to want to add a scale bar and get the "N=" corrected.
4. Even after the "N=" is improved, this number may not be correct! I have not done enough checking to eliminate sites duplicated among the three sources used here:
   • The IAS site files (the best source).
   • A set of four 15' CAA master quads digitized several years ago by Laurie Swanson and Ray Druhot.
   • Some additional CAA master quads digitized earlier this year by Jim Oliver, who was unaware of the earlier coverages (through no fault of his own).
5. Anything else?