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Digital data set describing surficial geology in the conterminous US
This digital data set describes surficial geology of the conterminous United States. The data set was generated from a U.S. Geological Survey 1:7,500,000-scale map of surficial... -
Tillage Practices in the Conterminous United States, 1989-2004--Datasets Aggregated by Watershed; tillage_lu92e
This dataset is an aggregation of county-level tillage practices to the 8-digit hydrologic unit watershed. The original county-level data were collected by the Conservation... -
Geologic Provinces of the Arctic, 2000 (prvarcst)
This coverage includes arcs, polygons and polygon labels that describe Arctic portion of the U.S. Geological Survey defined geologic provinces of the World in 2000. -
usSEABED: Offshore Surficial-Sediment Database for Samples Collected within the United States Exclusive Economic Zone
Since the second half of the 20th century, there has been an increase in scientific interest, research effort, and information gathered on the geologic sedimentary character of... -
Base-flow index grid for the conterminous United States
This 1-kilometer raster (grid) dataset for the conterminous United States was created by i nterpolating base-flow index (BFI) values estimated at U.S. Geological Survey (USGS)... -
Attributes for NHDPlus Catchments (Version 1.1)for the Conterminous United States: Contact Time, 2002
This data set represents the average contact time, in units of days, compiled for every catchment of NHDPlus for the conterminous United States. Contact time, as described in... -
Circum-Arctic Resource Appraisal (north of the Arctic Circle) Assessment Units
The Assessment Unit is the fundamental unit used in the World Petroleum Resources Project. The Assessment Unit is defined within the context of the higher-level Total Petroleum... -
Attributes for NHDplus Catchments (Version 1.1) for the Conterminous United States: Population Density, 2000
This data set represents the average population density, in number of people per square kilometer multiplied by 10 for the year 2000, compiled for every catchment of NHDPlus for... -
Aerial Images of Alaska's Arctic Coastal Plain, 1974-1979
This dataset is comprised of 11 geo-referenced aerial images of two study areas (Teshekpuk Lake Special Area and the Chipp River) in the National Petroleum Reserve - Alaska... -
Aerial Images of Alaska's Arctic Coastal Plain, 1948-1949
This dataset is comprised of 35 geo-referenced aerial images of four study areas (Teshekpuk Lake Special Area, Chipp River, Colville River Delta, and Dalton Highway Corridor) on... -
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Hydrologic Landscape Regions
This data set represents the area of Hydrologic Landscape Regions (HLR) compiled for every catchment of NHDPlus for the conterminous United States. The source data set is a... -
Attributes for NHDPlus Catchments (Version 1.1): Level 3 Nutrient Ecoregions, 2002
This data set represents the area of each level 3 nutrient ecoregion in square meters, compiled for every catchment of NHDPlus for the conterminous United States. The source... -
Geologic Provinces of the Circum-Arctic, 2008 (north of the Arctic Circle)
This shapefile includes arcs and polygons that describe U.S. Geological Survey defined 33 geologic provinces of the Circum-Arctic (north of the Arctic Circle). Each province has... -
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Physiographic Provinces
This dataset represents the area of each physiographic province (Fenneman and Johnson, 1946) in square meters, compiled for every catchment of NHDPlus for the conterminous... -
Aerial Image of Alaska's Arctic Coastal Plain, 1955
This dataset is comprised of one geo-referenced aerial image from the National Petroleum Reserve - Alaska (NPRA) on Alaska's Arctic Coastal Plain taken on 21 June 1955 by the... -
Avian Habitat Data, Seward Peninsula, Alaska, 2012
This data package contains two tables with habitat measurements from each sampling point used in avian point-transect surveys on the Seward Peninsula in 2012 and the locations... -
Oblique Photographs Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013
This dataset contains aerial oblique digital photos taken of the arctic landscape during low altitude photo survey transects in northwest Alaska, July 2013. Three flight...
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