EarthDEM

EarthDEM is a comprehensive project offering 2m GSD Digital Elevation Models (DEMs) and mosaics, with data spanning from 2002 to the present. The initiative addresses the critical need for high-resolution, time-series elevation data specifically for non-polar regions. These datasets are derived from in-track and cross-track high-resolution (~0.5 meter) imagery captured by the Maxar constellation of optical imaging satellites.

The time-dependent nature of the individual strip DEM files is particularly valuable, allowing users to perform change detection analysis and compare observations of topography acquired across different seasons or years. Mosaic DEM tiles are also available, constructed from multiple strip DEMs to provide a more consistent and extensive product over larger geographical areas.

While only a segment of the worldwide EarthDEM dataset is publicly accessible, federally-funded researchers have the opportunity to access the entire collection via NASA CSDA's Smallsat Data Explorer. The data is managed by the Polar Geospatial Center and is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0), promoting open usage and research.