The US Interagency Elevation Inventory, or USIEI, is a nationwide listing of known publicly available high-accuracy topographic and bathymetric source elevation data for the United States and its territories. The inventory provides a single resource for information about all known completed and in-progress broad-area public domain elevation data.
Collaborate with Others
The USGS National Geospatial Program (NGP) manages the 3D Elevation Program (3DEP), a program designed to acquire nationwide lidar for the lower 48, Hawaii and the US Territories, and IfSAR data over Alaska. The NGP works with Federal, State, Tribal, and local agencies to set priorities and establish the annual acquisition plans.