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The U.S. Interagency Elevation Inventory (USIEI) is a nationwide listing of known high-accuracy topographic and bathymetric data, including lidar, IfSAR, and hydrographic surveys. It is a collaborative effort between NOAA, USGS, FEMA, USDA, and other federal agencies. The inventory provides attribute information and footprints for data sets, updated quarterly, but does not include the raw elevation data itself.
This download contains metadata and footprints only, not the actual elevation data. Data is provided in Esri file geodatabase and OGC GeoPackage formats.