The Illinois State Archaeological Survey offers a GIS-based tool that draws on more than a century of data to predict the probability of encountering an archaeological site in any 2-acre section of Illinois. 

Land owners, developers, preservationists, and other Illinoisans can use this Illinois Archaeological Predictive Model (IAPM) to proactively assess and protect archaeological resources while enabling sustainable development. 

To use the online predictive model, visit https://go.isas.illinois.edu/IAPM. Once you have obtained results from the model, you can request additional free consultation from ISAS archaeologists.