The California Protected Areas Database (CPAD) contains GIS data about lands that are owned in fee and protected for open space purposes by over 1,000 public agencies or non-profit organizations.
User Manual – Download the CPAD User Manual
CPAD has three levels of data about protected lands:
The core element in the CPAD database is the Holdings, which have the most detailed attribute information in CPAD. Holdings are equivalent to assessor parcels, however CPAD holdings may not full align with such parcels.
Commonly named and owned protected areas within a single county (e.g., “Mt. Diablo State Park”) are Units, which may be made up of two or more Holdings. A unit may also have just one holding (e.g., an urban park, or another single parcel protected area). Units have summary attribute information. Commonly owned holdings that have different access attributes are defined as different Units.
Super Units are defined for use as cartographic aids (they show the outer boundary of groups of holdings, that have same name, manager, and access, regardless of county), as well as to support application developers working on recreational access projects that focus on knowing who manages sites.