Cores areas (one of the layers in this payer package) are turned off by default and can be turned on in map view. Cores were created using CPAD & CCED lands >= 1000 acres with GAP status 1-3 intersected with resistance < 250.
Corridors were truncated at 1.5 km.
Resistance surface used can be found here: https://databasin.org/datasets/76dc53d2f3e1433babad79968649801c