The Protected Areas Database of the United States (PAD-US) is a national database of federal and state conservation lands. It contains the most current information about publicly held conservation lands (with conservation measures available) in the U.S. It was first published for delivery to the UNEP-World Conservation Monitoring Center's (WCMC) World Database for Protected Areas (WDPA) in April 2009 by USGS GAP, on behalf of the PAD-US Partnership.