This data set contains lines and polygons representing coastal hydrography used in the creation of the Environmental Sensitivity Index (ESI) for the Aleutian Islands.This data set comprises a portion of the ESI for Aleutians East Borough and Aleutians West Coastal Resource Service Area (CRSA). The HYDRO data layer contains all annotation used in producing the atlas. The annotation features are categorized into three subclasses in order to simplify the mapping and quality control procedures: GEOG or geographic features, SOC or socioeconomic features, and HYDRO or water features.

This data set contains vector polygons representing the boundaries of the U.S. Geological Survey 1:63,360 and 1:250,000 topographic maps and other map and digital data boundaries used in the creation of the Environmental Sensitivity Index (ESI) for the Aleutian Islands.This data set comprises a portion of the ESI data for Aleutians East Borough and Aleutians West Coastal Resource Service Area (CRSA). These data identify the marine and coastal environments and wildlife.

This data set contains biological resource data for crabs and bivalves in the Aleutian Islands, Alaska. Vector polygons in this data set represent locations of invertebrate concentration areas. Species-specific abundance, seasonality, status, life history, and source information are stored in relational data tables (described below) designed to be used in conjunction with this spatial data layer.This data set comprises a portion of the Environmental Sensitivity Index (ESI) data for Aleutians East Borough and Aleutians West Coastal Resource Service Area (CRSA).

This data set contains management area data for National Wildlife Refuges in the Aleutian Islands, Alaska. Vector polygons in this data set represent management areas. Location-specific type and source information are stored in relational data tables (described below) designed to be used in conjunction with this spatial data layer.This data set comprises a portion of the Environmental Sensitivity Index (ESI) data for Aleutians East Borough and Aleutians West Coastal Resource Service Area (CRSA). These data identify the marine and coastal environments and wildlife.

This data set contains biological resource data for sea otters and walrus in the Aleutian Islands, Alaska. Vector polygons in this data set represent locations of marine mammal concentrations. Species-specific abundance, seasonality, status, life history, and source information are stored in relational data tables (described below) designed to be used in conjunction with this spatial data layer.This data set comprises a portion of the Environmental Sensitivity Index (ESI) data for Aleutians East Borough and Aleutians West Coastal Resource Service Area (CRSA).

This data set contains biological resource data for seals and sea lions in the Aleutian Islands, Alaska. Points in this data set represent locations of haulout and rookery sites. Species-specific abundance, seasonality, status, life history, and source information are stored in relational data tables (described below) designed to be used in conjunction with this spatial data layer.This data set comprises a portion of the Environmental Sensitivity Index (ESI) data for Aleutians East Borough and Aleutians West Coastal Resource Service Area (CRSA).

This data set contains biological resource data for alcids, shorebirds, waterfowl, diving birds, pelagic birds, gulls and terns in the Aleutian Islands, Alaska. Points in this data set represent locations of bird nesting sites.

This data set contains human-use resource data for Coastal Resource Service Area (CRSA) boundaries, mineral sites, airports, boat ramps, marinas, and Coast Guard stations in the Aleutian Islands, Alaska. Vector points and lines in this data set represent human-use site locations and boundaries. Location-specific type and source information is stored in relational data tables (described below) designed to be used in conjunction with this spatial data layer.This data set comprises a portion of the Environmental Sensitivity Index (ESI) data for Aleutians East Borough and Aleutians West CRSA.

This data set contains point locations of active volcanoes as compiled by Motyka et al., 1993. Eighty-nine volcanoes with eruptive phases in the Quaternary are mapped as points centered in the active caldera or volcano summit. Volcanoes with a number of satellite vents and/or cones distributed around the main caldera or summit are given a unique identifier so it is clear that geothermal activity is likely to be found away from the point on the map.

This data set contains vector polygons representing the boundaries of the 1:250,000 map boundaries used in the creation of the Environmental Sensitivity Index (ESI) for the Bristol Bay Subarea. (The Subarea includes marine and coastal areas of Bristol Bay and part of the southern Alaska Peninsula.