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What is a DEM?
DEM stands for digital elevation model. The model is usually a raster file with representation of continuous elevation values over a topographic surface by a regular array of z-values (contained in pixels). The resolution of DEMs varies depending on the area the pixels represent. DEMs are typically used to represent terrain relief. This page provides links to sources of and information about DEMs.
DEM Related Links
Michigan 1 Meter DEM
An easy, interactive finding aid for 1 meter DEM data in Michigan. DEM data was derived from LiDAR as part of the USGS 3DEP program. This data and other state coverages are available at The National Map website.
SRTM Mission Description
Data from the SRTM mission provides DEMs for the whole globe. This page describes the SRTM mission and gives backgound about the SRTM data.
CGIAR SRTM Data Finder
A source for SRTM DEMs
SRTM Tile Grabber
Easy download source for 90 meter SRTM data.
Earth data has satellite data from NASA - not exclusively DEMs but includes the SRTM mission.
Under Datasets - Digital Elevation there are several products available for download. Clicking on the information "i" icon next to the products will link to information about the various data types.
Open Source DEM data available for download. Also has useful tutorials about Lidar data.
The 3D Elevation Program—Summary for Michigan
Describes the current types and coverage of USGS LiDAR data for the state of MI.
NOAA DEM Inventory
Find out if/when new higher resolution DEMs are available for areas within the US.
QGIS Tutorial for working with Terrain Data
"Terrain or elevation data is useful for many GIS Analysis and it is often used in maps. QGIS has good terrain processing capabilities built-in. In this tutorial, we will work through the steps to generate various products from elevation data such as contours, hillshade etc."