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Protected Areas Database of the United States (PAD-US) 2.1


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U.S. Geological Survey (USGS) Gap Analysis Project (GAP), 2020, Protected Areas Database of the United States (PAD-US) 2.1: U.S. Geological Survey data release,


NOTE: A more current version of the Protected Areas Database of the United States (PAD-US) is available: PAD-US 3.0 The USGS Protected Areas Database of the United States (PAD-US) is the nation's inventory of protected areas, including public land and voluntarily provided private protected areas, identified as an A-16 National Geospatial Data Asset in the Cadastre Theme ( The PAD-US is an ongoing project with several published versions of a spatial database including areas dedicated to the preservation of biological diversity, and other natural (including extraction), recreational, or cultural uses, managed for these purposes through legal or other [...]


Attached Files

Click on title to download individual files attached to this item.
“Processing Step 1 - PAD-US 2.1 Blank Schema”
124.81 KB application/zip
“Processing Step 2 - PAD-US 2.1 Source Data Collection and Translation”
395.55 KB application/zip
“Processing Step 3 - PAD-US 2.1 Quality Assessment and Quality Control”
99.51 KB application/zip
“Processing Step 4 - PAD-US 2.1 Local Agency to Agency Name Crosswalk”
7.93 MB text/x-python
“Processing Step 5 - Transfer Locally Reviewed Measures from PAD-US 2.0”
33.93 KB application/zip
“Processing Step 6 - Categorical Assignments by Designation Type”
9.27 KB application/zip
“Processing Step 7 - Multiple Feature Class Implementation”
20.3 KB application/zip
“Processing Step 8 - Database Aggregation and Load Order”
26.23 KB application/pdf
“Processing Step 9 - PAD-US 2.1 Review”
42.64 MB application/zip

“PAD-US 2.1 File Geodatabase Download Package”
2.61 GB application/zip
“PAD-US 2.1 Frequently Asked Questions Metadata”
130.52 KB text/html
“PAD-US Version History”
20.81 KB text/plain
“PAD-US 2.1 .txt formatted Metadata”
99.46 KB text/plain
“PAD-US 2.1 HTML formatted Metadata”
186.38 KB text/html


The PAD-US geodatabase was originally developed to organize and assess the management status (i.e. apply 'GAP Status Code') of elements of biodiversity protection by identifying species and plant communities not adequately represented in existing conservation lands. In cooperation with the United Nations Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), PAD-US also supports global conservation analyses to inform policy decisions. The dataset is robust and has been expanded in recent years, culminating in major additions to PAD-US 2.1, to support the recreation, natural resource management, wildfire, emergency management, transportation, research, and public health communities. New applications are frequently discovered. Multiple attributes and a flexible database structure provide context for data to be used at local (depending on inventory completeness in the local area), regional, state, national, and international scales. See for more information.


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Revision 2.1 completed by the Protected Areas Database of the Unites States Team/Gap Analysis Project/Science Analytics and Synthesis/Core Science Systems. To review the changes that were made, see “VersHist-PAD-US” in the attached files section.

Additional Information


Type Scheme Key
DOI doi:10.5066/P92QM3NT

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