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2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polyline shapefile represents roads in North America only, including preliminary scale ranking and full list of attributes. The “basic” roads ... North American Cartographic Information Society.
2004. Instituto Nacional de Estadística, Geografía e Informática (Mexico), Geological Survey (U.S.), and Canada Centre for Remote Sensing. This line shapefile represents roads in North America at 1:1,000,000 scale. The roads included in this layer are either those that connect major ce... Geological Survey (U.S.).