|14-digit HUC boundaries|
New Jersey 14-digit Hydrologic Catalog Unit (HUC) watershed boundaries.
Maryland 14-digit Hydrologic Catalog Unit (HUC) watershed boundaries.
North Carolina 14-digit Hydrologic Catalog Unit (HUC) watershed boundaries.
Census tract boundaries (geography only) from the US Bureau of Census (2000 Census).
State boundaries for the ASC study area
|Digital Elevation models|
3-arc-second DEMs at the 1:250,000-scale. Resolution: approx. 100 m.
The drainage basin boundaries were obtained by aggregating 1:2,000,000-Scale Hydrologic Unit Boundaries for each drainage basin.
Ecoregions based on Bailey’s map (1995)
Surficial geology at a scale of 1:7,500,000
|Land use distributions|
Similar to the ascnlcd.zip above but with more generalized classes. This is the one being used for the ASC project. The classes for ASC purposes can be found at: http://www.epa.gov/mrlc/classes.html
30-m resolution land cover distributions from Landsat TM acquired by Multi-Resolution Land Characteristics (MRLC) Consortium. Definition of classes can be found at http://www.epa.gov/mrlc/classes.html
|Major Land Resource Areas|
Areas of similar pattern of soils, climate, water resources and land uses. Scale: 1:2,000,000.
Physiographic provinces and sections based on 1:17,000,000-scale map.
Several attributes have been computed for each mapping unit. Scale: 1:250,000. See Statsgo attribute definitions.txt
Transport and coastline reaches and routes from the National Hydrography Dataset (NHD).
|Study area boundary|
The study area boundary is the outer boundary of drainage basins contained in the Atlantic Slope region