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Table 1 Summary information on the four publicly and commercially available road datasets

From: The importance of accurate road data for spatial applications in public health: customizing a road network

Road Data Spatial Extent Currency Availability Source
NC DOT North Carolina 2005 Public North Carolina Dept. of Transportation
StreetMap Pro USA 2003 Commercial ESRI
TIGER/Line 2000 USA 2000 Public U.S. Census Bureau
TIGER/Line 2007 USA 2007 Public U.S. Census Bureau