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Theme Lead Agency: United States Census Bureau (US Census)
Theme Lead: Dierdre Bevington-Attardi (US Census)

 Census Blocks


Committees and Workgroups

Geospatial Standards

Governmental Units, and Administrative and Statistical Boundaries Theme Definition: Boundaries that delineate geographic areas for uses such as governance and the general provision of services (e.g., States, American Indian reservations, counties, cities, towns, etc.), administration and/or for a specific purpose (e.g., Congressional Districts, school districts, fire districts, Alaska Native Regional Corporations, etc.), and/or provision of statistical data (census tracts, census blocks, metropolitan and micropolitan statistical areas, etc.). Boundaries for these various types of geographic areas are either defined through a documented legal description or through criteria and guidelines. Other boundaries may include international limits, those of federal land ownership, the extent of administrative regions for various federal agencies, as well as the jurisdictional offshore limits of U.S. sovereignty. Boundaries associated solely with natural resources and/or cultural entities are excluded from this theme and are included in the appropriate subject themes.

National Boundaries Group:

The purpose of the National Boundaries Group (NBG) is to develop nationally consistent boundaries that are integrated using the same geographic base. The goal is to make sure federal boundary sources are consistent, accurate, and integrated.

How to Join This Community


Other Related Committees:

  • FGDC Cadastral Subcommittee
  • FGDC Marine Boundary Working Group

Information technology - Codes for the Identification of Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas (INCITS) (2010)

Information technology - Codes for the Identification of the States and Equivalent Areas within the United States, Puerto Rico, and the Insular Areas (INCITS) (2010)

Information technology - Codes for the Identification of Metropolitan and Micropolitan Statistical Areas and Related Statistical Areas of the United States and Puerto Rico (INCITS) (2010)

Information technology - Codes for the Identification of Congressional Districts and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas (INCITS) (2010)

Geopolitical Entities, Names, and Codes (GENC) Standard - the U.S. Government Profile of ISO 3166 (Codes for the representation of names of countries and their subdivisions, Part 1 – Country codes, and Part 2 – Country subdivision code)

Framework Data Standard: Part 5, Governmental Unit and Other Geographic Area Boundaries

Federal Register Notices

NGDA Governmental Units Community

NGDA Governmental Units Community

Community Type: A-16
Sponsor: FGDC
Sponsor Email:

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