Filters: Tags: Railroads (X) > partyWithName: USGS Forest and Rangeland Ecosystem Science Center (X)

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Railroads in the Western United States 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. Tags: Arizona, California, Colorado, Idaho, Montana, All tags... Nevada, New Mexico, Oregon, Utah, Washington, Western United States, Wyoming, railroad features, railroads, transportation, transportation features, Fewer tags Density of Line Features in the Western United States Density of linear features, such as roads, power lines, telephone lines, and railroad tracks have been shown to influence synanthropic predator abundance patterns (Knight et al. 1995). Following Knight et al. (1995), we used linear features such as roads, railroads, and power line spatial data sets, but also included irrigation canals, to build a linear features spatial data set. However, we lacked spatial data on telephone and feeder-power lines and therefore our linear feature spatial data set vastly underestimates the number of linear features in some areas. Categories: Data; Types: Downloadable, Map Service, Shapefile; Tags: Arizona, California, Colorado, Idaho, Montana, All tags... Nevada, New Mexico, Oregon, Utah, Washington, Western United States, Wyoming, canals, inlandWaters, irrigation, linear density, linear features, power lines, railroad features, railroads, roadways, transportation, utilitiesCommunication, utility corridors, Fewer tags Railroads of North America Distribution of major railroads in North America. Tags: Built Environment, Canada, Network, North America, Rail, All tags... Railroads, Railway, Transportation, Transportation Networks, US, USA, United States, Fewer tags Anthropogenic Fragmentation in the western United States We evaluated the fragmentation of the western United States by anthropogenic features. The addition of roads, railroads, and power lines to wildlands, and the conversion of wildlands to agricultural land and/or urban areas, induces fragmentation. We used the following spatial data sets to model anthropogenic fragmentation: agricultural land, populated areas, power lines, railroads, and roads. Because we were interested in the spatial arrangements of wildland patches and how anthropogenic fragmentation affects wildlife dispersal, we buffered some of these spatial data sets according to their area of influence. For example, the area of influence of interstate highways extends beyond the traffic lanes (Rowland et al.... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, California, Colorado, Idaho, Montana, All tags... Nevada, New Mexico, Oregon, Utah, Washington, Wyoming, agriculture, conservation assessment, environment, habitat fragmentation, human impacts, power lines, railroads, roadways, society, urban, Fewer tags