Supporting Themes Standards and Specifications

Quick Links:

• Government Units Dataset, Data Model Poster (Size: 48" x 34.5", 152 MB)

  • Government Units Dataset, Data Model Poster (Reduced File Size) (Size: 48" x 34.5", 3.26 MB)

    • Initially posted 2006
    • Revised and reposted in August 14, 2026

• National Structures Dataset (NSD), Data Model Poster (Size: 26" x 22", 68 MB)

  • National Structures Dataset (NSD), Data Model Poster (Reduced File Size) (Size: 26" x 22", 7.62 MB)

    • Initially posted 2006
    • Revised and reposted in July 10, 2019
    • Revised and reposted April 15, 2026

• National Transportation Dataset (NTD), Data Model Poster (Size: 36" x 23", 41.4 MB)

  • National Transportation Dataset (NTD), Data Model Poster (Reduced File Size) (Size: 36" x 23", 1.88 MB)

    • Initially posted 2019
    • Revised and reposted April 30, 2020
    • Revised and reposted June 1, 2026
    • Minor correction and reposted August 7, 2026

For comments or questions about any USGS National Geospatial Program Standards and Specifications, please e-mail tnm_help@usgs.gov.