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State
Shellfish
State of Connecticut —
Shellfish polygons were digitized from hand drawn polygons representing hardclam, softclam, and oyster beds produced by the Department of Agriculture from their... -
State
2019 California Water Quality Status Report
State of California —
The California Water Quality Status Report is an annual data-driven snapshot of the Water Board’s water quality and ecosystem data. This third edition of the report... -
State
Migratory Waterfowl
State of Connecticut —
Migratory Waterfowl is a 1:24,000-scale, polygon feature-based layer that depicts the concentration areas of migratory waterfowl at specific locations within... -
Federal
BETA - Hazard Exposure: Principal Ports NGDA
Federal Geographic Data Committee —
The BETA - Hazard Exposure: Principal Ports dataset was updated on October 16, 2025 from the Bureau of Transportation Statistics (BTS) and is part of the U.S.... -
State
California Fish Passage Assessment Database [ds69]
State of California —
The Passage Assessment Database (PAD) geospatial file contains locations of known and potential barriers to salmonid migration in California streams with additional... -
State
Coastal Area
State of Connecticut —
The Coastal Area layer is a 1:24,000-scale, polygon feature-based layer that includes the land and waters that lie within the Coastal Area as defined by Connecticut... -
State
Surface Water Quality Polygon
State of Connecticut —
See full Data Guide here. Surface Water Quality Classifications Set: This dataset is a line and a polygon feature-based layer compiled at 1:24,000 scale that includes... -
Federal
BETA - Hazard Exposure: National Highway System NGDA
Federal Geographic Data Committee —
The BETA - Hazard Exposure: National Highway System dataset was updated on October 16, 2025 from the Bureau of Transportation Statistics (BTS) and is part of the U.S.... -
State
Salt Water Limit
State of Connecticut —
Salt Water Limit is a 1:24000-scale, line feature-based layer that depicts the approximate salt water limits of watercourses and embayments in coastal Connecticut. It... -
State
Continually Updated Shoreline Product
State of Oregon —
The Oregon CUSP shoreline represents a "best of" attempt to create a continuous Mean High Water Shoreline for use in GIS analysis and inventory work. Whenever... -
Federal
BETA - Hazard Exposure: Select North American Rail Network Lines NGDA
Federal Geographic Data Committee —
The BETA - Hazard Exposure: Select North American Rail Network Lines dataset was updated on October 16, 2025 from the Bureau of Transportation Statistics (BTS) and is... -
State
California Counties
State of California —
This layer contains the boundaries for California’s 58 counties. County features are derived from the US Census Bureau's TIGER/Line database and have been clipped to... -
Federal
OCS Marine Minerals Lease Areas NGDA
Department of the Interior —
The Federal Outer Continental Shelf (OCS) Marine Mineral (e.g. sand and gravel) Lease Areas layer is maintained by the Bureau of Ocean Energy Management (BOEM), part... -
State
Coastal Area Polygon
State of Connecticut —
Coastal Area & Boundary Polygon: The Coastal Area layer is a 1:24,000-scale, polygon feature-based layer that includes the land and waters that lie within the... -
Federal
Water chemistry data for three agricultural ponds in the southern Coastal Plain of Georgia, USA
Department of Agriculture —
Ponds used to capture and store water for irrigation are a common feature in agricultural landscapes of the southern Coastal Plain of Georgia, USA. However, not much... -
State
Surficial Materials
State of Connecticut —
See full Data Guide here. This data layer includes the information portrayed on the Surficial Materials Map of Connecticut (Stone, J.R., Schafer, J.P., London, E.H.... -
State
Coastal Boundary Polygon
State of Connecticut —
Coastal Area & Boundary Polygon: The Coastal Area layer is a 1:24,000-scale, polygon feature-based layer that includes the land and waters that lie within the... -
State
California Overlapping Cities and Counties and Identifiers
State of California —
WARNING: This is a pre-release dataset and its fields names and data structures are subject to change. It should be considered pre-release until the end of 2024.... -
State
Eelgrass Beds 2002 Polygon
State of Connecticut —
Eelgrass Beds 2002 Set: Field Verification of Eelgrass beds, located in the Long Island Sound, Eastern shore of Connecticut from Clinton Harbor to the Rhode Island... -
State
Eelgrass Beds Historic Points
State of Connecticut —
Eelgrass Beds Historic Set: Historic Eelgrass Points is a 1:24,000-scale, point feature-based layer that depicts the locations of historic eelgrass beds (Zostera...