Digital Elevation Model Data
The accepted framework layer for elevation in Montana is the USGS National Elevation Dataset. To reduce duplication of effort this data will no longer be available directly from the Montana State Library. Data can be downloaded from the USGS National Map Download Platform.
For Montana, 1/3 arc-second data and 1 arc-second data are available for the entire state. The ground resolution of 1-arc second data is approximately 30 meters, and the resolution of 1/3 arc-second data is approximately 10 meters.
The data are available as prepackaged, downloadable, 1 degree tiles in ArcGrid, GridFloat, and IMG formats. You may define custom areas of interest, but all of the 1 degree tiles intersecting the area of interest will be included in the delivery.
To download the data, zoom to your area of interest on the map. Click the Map Indices checkbox to see the 1 degree tile boundaries. Select the product you want from the list on the left side and click on the Find Products button. A list of 1 degree quads will be produced. Use the shopping cart buttons to add them to your cart. Click the View Cart button and then click the download links for the data files you selected.