1939 Oaks

Data associated with Oak Ecosystems Recovery Plan for the Chicago Wilderness Region (October, 2015). Lake County Forest Preserve District and The Morton Arboretum were lead collaborators for this project. The following text is taken from their metadata for this layer.

The purpose of this data is to show where pre-European settlement oak ecosystems were present in 1939.

This data was created by Matt Casali at The Morton Arboretum. The data represents oak ecosystems of the Chicago Wilderness region that were present in 1939. The data was created by analyzing multiple data sources including aerial imagery from 1939, pre-settlement vegetation maps created by Marlin Bowles and Jenny McBride, and Public Land Survey data which included the species of the bearing and line trees present in forested areas. Included parcels had to be greater than one acre in size and could not encompass major roads or urbanized areas.