Filters: Contacts: USGS Forest and Rangeland Ecosystem Science Center (X)252 results (155ms)
This data set maps sagebrush mortality in Utah delineated by Utah Division of Wildlife Resources personnel during the summer of 2003.
Distance to the nearest road.
Current Distribution of Sagebrush and Associated Vegetation in the Columbia Basin and Southwestern Regions
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...
Growing Season (May to August) Global Solar Radiation within the Wyoming Basins Ecoregional Assessment area
Growing Season (May to August) Global Solar Radiation within the Wyoming Basins Ecoregional Assessment area.
Location of agriculture obtained from the LANDFIRE (90m) Existing Vegetation Type dataset
Proportion of All Sagebrush Species Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area
Proportion of all sagebrush species land cover within a 1-km radius developed using a circular focal moving window analysis.
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.
All roads in the western United States from the 2000 US Census Bureau 1:100,000 scale TIGER/line files.
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.
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.
Proportion of Low and Black Sagebrush Land Cover (5-km scale) in the Wyoming Basins Ecoregional Assessment area
Proportion of low and black sagebrush land cover within a 5-km radius developed using a circular focal moving window analysis.
Proportion of juniper land cover within a 18-km radius developed using a circular focal moving window analysis.
Proportion of Salt Desert Shrub Land Cover (1-km scale) in the Wyoming Basins Ecoregional Assessment area
Proportion of salt desert shrub land cover within a 1-km radius developed using a circular focal moving window analysis.
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.
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.
Density of all roads (km/sq km) within a 5-km radius in the Wyoming Basins Ecoregional Assessment area
Density of all roads within a 5-km radius developed using a circular focal moving window analysis.
Proportion of grassland land cover within a 5-km radius developed using a circular focal moving window analysis.
Location of mixed shrubland land cover obtained from the LANDFIRE Existing Vegetation Type dataset.
Proportion of All Sagebrush Species Land Cover (540-m scale) in the Wyoming Basins Ecoregional Assessment area
Proportion of all sagebrush species land cover within a 540-m radius developed using a circular focal moving window analysis.
Communication antenna towers registered with the U.S. Federal Communications Commission's Antenna Structure Registration (ASR) program. The FCC requires that all towers >200 ft tall and towers <200 ft that are positioned in the glide path of an airport be registered with the FCC ASR program. Therefore, this data set does not necessarily depict all communication antennas actually present on the landscape. The source data are updated weekly by the FCC as new permits are issued. However, this data set is designed for a specific analysis, and is planned to remain static as of the publication date (11/06/2003).