Data / Site & infrastructure / Ground
Slope
Slope computed from the ~30 m DEM, then averaged over each H3 hexagon. Also shows the share of the hexagon steeper than 15 % and 25 %.
About this data
- Published by
- U.S. Geological Survey
3D Elevation Program, 1 arc-second DEM (AWS open data) - Method
- Downloaded from 3D Elevation Program, 1 arc-second DEM (AWS open data).
- Update frequency
- Continuous
- Last updated
- Oct 6, 2026
- Records
- 537,000
- Coverage
- Slope computed from the ~30 m DEM, then averaged over each H3 hexagon. Also shows the share of the hexagon steeper than 15 % and 25 %.
Records in 56 of 56 counties. - License
- Public domain
Known gaps
Averaged over ~0.7 km², so a buildable bench on a steep hillside, or a cut bank on flat ground, will not show. For a building pad, use the 1 m lidar where it exists (USGS 3DEP).
Preview
The newest or first 500 records. Click a column heading to sort. Use the filter to find a place or a name.
Fields
| Field | Column | Description |
|---|---|---|
| Cell | cell | |
| Sl | sl | |
| Steeper than 15 % | s15 | |
| Steeper than 25 % | s25 | |
| Dwb | dwb | |
| Sep | sep | |
| Frm | frm | |
| Drn | drn | |
| Sg | sg | |
| Rps | rps | |
| Rpc | rpc | |
| Bp | bp |
Downloads and links
Data 4 MT is an index of public records. It republishes only what Montana and federal agencies make public, with a link to the source on each record. People are shown as “Private individual” on public pages and downloads; companies, trusts held by institutions, and governments keep their names. No document images, sale prices, voter, MVD or wildlife-telemetry data are stored. Verify any record against the publisher’s copy before relying on it.