Staff from the Illinois State Archaeological Survey (ISAS) are looking to new technology to tie Cahokia’s grid to real-world coordinates. This will be the first time researchers and other state agencies will be able to integrate lidar with excavation data at Cahokia.
In conjunction with the Illinois Historic Division of the Illinois Department of Natural Resources, ISAS is working to tie the Cahokia grid to real-world coordinates. During the early 1970s, permanent grid markers were embedded across the site. Now, through the use of modern high-accuracy GPS survey equipment, ISAS scientists are obtaining real-world coordinates at these grid markers with an accuracy of several millimeters. This information is being made available to researchers and other state agencies.