Cook County parcel records associated with the Forest Preserve District of Cook County 2012 Land Acquisition Plan.

The plan document identifies Focus Areas on a map spanning pages 16 and 17. Openlands used this map to create a generalized spatial data layer of the Focus Areas. This Focus Area layer was then intersected with 2016 Cook County parcel data. The resulting intersection was edited at a representative fraction of 1:15000 with 2017 aerial imagery to remove parcels dominated by impervious human infrastructure.