Supporting themes for The National Map (TNM) include Transportation, Structures, Boundaries, Land Cover, Orthoimagery, and Small Scale datasets.
Browse the links below for specification information.
- National Structures Dataset (NSD), Data Model Poster (plot size 26" x 22", 164 KB)
- Initially posted 2006, revised and reposted July 10, 2019
- National Transportation Dataset (NTD), Data Model Poster (plot size 36" x 22", 4.5 MB)
- Initially posted 2019, revised and reposted April 30, 2020
For comments or questions about any USGS National Geospatial Program standards and specifications, please e-mail firstname.lastname@example.org.