Environment
3DEP Elevation (DEM) — Alaska
USGS 3D Elevation Program — national DEM. Use for slope, aspect, hillshade, and terrain analysis.
Why this data matters
- Elevation and derived slope drive access, safety, and viewshed analysis.
- 3DEP is the national standard; use for hillshade rendering and slope-angle shading (e.g. CalTopo-style).
Data source
| Field | Value |
|---|---|
| Agency | U.S. Geological Survey (3DEP) |
| Coverage | National (Alaska included) |
| Use | ImageServer — elevation, slope, aspect in clients |
Related
- NHD Hydrography · Slope & Terrain Safety (TrueTopo preset)
GIS Endpoints
REST (ArcGIS)
https://elevation.nationalmap.gov/arcgis/rest/services/3DEPElevation/ImageServer
QGIS: Layer → Add Layer → Add WMS/WFS Layer → paste URL. ArcGIS: Add Data → Data from Path.
View this layer in the TrueTopo map
Open app.truetopo.com →