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Density (km / km^2) of all roads in the western United States. Dataset was developed to generalize the 2000 US Census TIGER/Line Roads layer to a density within 18km of each pixel. Obtained from 2000 US Census TIGER/Line Roads using LINEDENSITY with an 18km search radius.
Major roads in northern North America as determined by the U.S. National Atlas and The National Atlas of Canada (geogratis.cgdi.gc.ca). National data layers were re-attributed and merged to create a seamless major road layer for North America.
All secondary roads in the western United States from the 2000 US Census TIGER/line files. Secondary roads are defined as all roadways not classified as an interstate, state highway, or federal highway.
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This dataset consists of point features identifying indices for potential passage rate at intersections with major transportation corridors for grizzly bear movements between the Greater Yellowstone Ecosystem (GYE) and Northern Continental Divide Ecosystem (NCDE) in the northwestern United States. Points are spaced at 300-meter intervals along major road corridors (interstates and U.S. highways) and are populated with values from Randomized Shortest Path (RSP) predictive raster models of potential male grizzly bear movement between the two ecosystems as described in Peck et al. 2016 (Potential paths for male-mediated gene flow to and from an isolated grizzly bear population, Ecosphere 8(10):e01969). RSP scores extracted...


    map background search result map search result map All Roads in the Western United States All Interstates and State and Federal Highways in the Western United States All Secondary Roads in the Western United States All Interstates in the Western United States Major Highways in North America All Road Density (18km) All State and Federal Highways in the Western United States USGS Small-scale Dataset - 1:1,000,000-Scale Major Roads of the United States 201403 Shapefile USGS Small-scale Dataset - 1:1,000,000-Scale Major Roads of the United States 201403 FileGDB 10.1 Potential grizzly bear passage along major road corridors in northwest Montana Potential grizzly bear passage along major road corridors in northwest Montana All Interstates in the Western United States All State and Federal Highways in the Western United States All Interstates and State and Federal Highways in the Western United States All Secondary Roads in the Western United States All Roads in the Western United States All Road Density (18km) USGS Small-scale Dataset - 1:1,000,000-Scale Major Roads of the United States 201403 Shapefile USGS Small-scale Dataset - 1:1,000,000-Scale Major Roads of the United States 201403 FileGDB 10.1 Major Highways in North America