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Federal
Environmental Sensitivity Index (ESI) Data Viewer and Data Services for Atlases NGDA
National Oceanic and Atmospheric Administration, Department of Commerce —
ESI data characterize the marine and coastal environments and wildlife based on sensitivity to spilled oil. There are three main components: shoreline habitats,... -
Federal
Omernik's Level III Ecoregions Of The Conterminous United States NGDA
U.S. Environmental Protection Agency —
Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial...