USFS Classification of Wetlands and Deepwater Habitats of the United States

http://www.fgdc.gov/standards/projects/FGDC-standards-projects/wetlands-mapping/index_html

The purpose of this standard is to support accurate mapping and classification of wetlands, while ensuring mechanisms for their revisions and update as directed under OMB Circular A-16, Revised. It is designed to direct the current and future digital mapping of wetlands.

The mapping standard will be used for all wetland mapping nationally including Federal Agencies, States, Tribes, especially if that mapping data will be uploaded into NWI/The National Map as a data layer. Specifically, if Federal funding is involved , then use of the proposed Standard is required. For all other efforts, use of the standard is strongly encouraged.