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Development of oil and gas wells leads to the destruction and fragmentation of natural habitat. Oil and gas wells also increase noise levels which has been shown to be detrimental to some wildlife species. Therefore, the density of oil and gas wells in the western United States was modeled based on data obtained from the National Oil and Gas Assessment.
This data set depicts soil characteristics in western North America. The data set was created from NRCS STATSGO soil data. Calculations were made to reduce one to many relationships to one to one relationships in order to summarize average water capacity, depth to rock, salinity, and pH for each map unit (MUID). ArcMap 8.3 was used to import .dbf files and merge newly created attribute fields to the GIS soil coverage.
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This data set maps sagebrush mortality in Utah delineated by Utah Division of Wildlife Resources personnel during the summer of 2003.
Locations of railroad lines for 11 western states. The Bureau of Transportation Statistics 1:100k Railroads line network was clipped to the boundary of the 11 Western States.
Map containing historical census data from 1900 - 2000 throughout the western United States at the county level. Data includes total population, population density, and percent population change by decade for each county. Population data was obtained from the US Census Bureau and joined to 1:2,000,000 scale National Atlas counties shapefile.
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This map was developed to examine multi-scale spatial relationships between percentage of sagebrush and other response variables of interest. A map of sagebrush in the western United States was used as a base layer for a moving window analysis to calculate the percentage of the area classified as sagebrush within a 50-km search radius.
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A new regional dataset was produced using decision tree classifier and other techniques to model landcover. Multi-season satellite imagery (Landsat ETM+, 1999-2003) and digital elevation model (DEM) derived datasets (e.g. elevation, landform, aspect, etc.) were utilized to derive rule sets for the various landcover classes. Eleven mapping areas, each characterized by similar ecological and spectral characteristics, were modeled independently of one another. An internal validation for modeled classes was performed on a withheld 20% of the sample data to assess model performance. Results of the validation will be presented in the final report and are not available at this time. Mapping area models were mosaicked to...
map background search result map search result map Current Distribution of Sagebrush and Associated Vegetation in the Columbia Basin and Southwestern Regions Proportion of Sagebrush Land Cover (50-km scale) in the western US Proportion of All Sagebrush Species Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of All Sagebrush Species Land Cover (540-m scale) in the Wyoming Basins Ecoregional Assessment area Elevation in the Wyoming Basins Ecoregional Assessment area Proportion of Grassland Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of Grassland Land Cover (5-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of Juniper Land Cover (18-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of Low and Black Sagebrush Land Cover (5-km scale) in the Wyoming Basins Ecoregional Assessment area Mixed Shrubland Land Cover in the Wyoming Basins Ecoregional Assessment area Railroads in the Western United States Oil and Gas Well Density in the Western United States Density of all roads (km/sq km) within a 5-km radius in the Wyoming Basins Ecoregional Assessment area Sagebrush Mortality in Utah - 2003 Proportion of Salt Desert Shrub Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area Distance (m) to all roads within the Wyoming Basins Ecoregional Assessment area Average STATSGO Soil Characteristics for the Western United States Growing Season (May to August) Global Solar Radiation within the Wyoming Basins Ecoregional Assessment area Human Population in the Western United States (1900 - 2000) All Roads in the Western United States Sagebrush Mortality in Utah - 2003 Distance (m) to all roads within the Wyoming Basins Ecoregional Assessment area Growing Season (May to August) Global Solar Radiation within the Wyoming Basins Ecoregional Assessment area Proportion of All Sagebrush Species Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of All Sagebrush Species Land Cover (540-m scale) in the Wyoming Basins Ecoregional Assessment area Elevation in the Wyoming Basins Ecoregional Assessment area Proportion of Grassland Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of Grassland Land Cover (5-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of Juniper Land Cover (18-km scale) in the Wyoming Basins Ecoregional Assessment area Proportion of Low and Black Sagebrush Land Cover (5-km scale) in the Wyoming Basins Ecoregional Assessment area Mixed Shrubland Land Cover in the Wyoming Basins Ecoregional Assessment area Density of all roads (km/sq km) within a 5-km radius in the Wyoming Basins Ecoregional Assessment area Proportion of Salt Desert Shrub Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area Average STATSGO Soil Characteristics for the Western United States Proportion of Sagebrush Land Cover (50-km scale) in the western US Railroads in the Western United States All Roads in the Western United States Current Distribution of Sagebrush and Associated Vegetation in the Columbia Basin and Southwestern Regions Human Population in the Western United States (1900 - 2000) Oil and Gas Well Density in the Western United States