The National Map (TNM)
USGS portal and Access API for elevation, hydrography, boundaries, transport, names and imagery.
| Publisher | U.S. Geological Survey |
|---|---|
| Coverage | United States
Bounding box (EPSG:4326): -179.2, 17.8, -64.5, 71.4 |
| Licence | LicenseRef-Public-Domain
Publisher's wording: Public domain |
| Themes | us-federal-general, open-data-sources |
| Update cadence | Not stated |
| Formats | Not stated |
| Status | active |
| Last verified | 2026-11-05 |
| Notes | TNM Access API scriptable |
| Recipe | Not stated |
| Related | Not stated |
Access endpoints
| Type | URL | Layer or index | Auth | Notes |
|---|---|---|---|---|
http | https://apps.nationalmap.gov/downloader/ | Not stated | none | Not stated |
api | https://tnmaccess.nationalmap.gov/api/v1/products | Not stated | none | TNM Access API - products by bbox, datasets (for example "Digital Elevation Model (DEM) 1 meter") and format; documented examples need no key. |