A summary of the relationship between GAP Status Codes and IUCN Definitions
This is not a crosswalk between IUCN Categories and GAP Status Codes, but it helps summarize their definitions and relationship. Only GAP Status Codes 1 and 2 meet the definition of protected by IUCN as, “A clearly defined geographical space, recognized, dedicated and managed, through legal or other effective means, to achieve the long-term conservation of nature with associated ecosystem services and cultural values”.
GAP Status Code 3 and 4 lands cannot be assigned an IUCN Category. While IUCN Ia, Ib, II are more likely to be GAP 1, many of these areas cannot permit natural disturbance events to persist and are GAP 2. Similarly, there are many IUCN Category III, IV and V protected areas that are managed as GAP 1. USGS GAP maintains an approved crosswalk to assign IUCN Categories to US protected areas based upon their management designation, landowner, GAP Status Code and size. Contact Lisa Johnson for the most current version.