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Transportation
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Year
1991
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1. United States Airports, 1991-2014
1991. TomTom International (Firm) and Environmental Systems Research Institute (Redlands, Calif.). Thisw polygon shapefile represents airport grounds and airport runways within the United States. All airports have a boundary, and most have at lea... Environmental Systems Research Institute (Redlands, Calif.).
2. World Time Zones, 1991-2011
1991. Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile represents the time zones of the world. The time zones are best displayed with World Countries or World Administrative Divis... Environmental Systems Research Institute (Redlands, Calif.).