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Bob
Baudendistel is a geospatial analyst for Intergraph Services Co., Huntsville, Ala.,
a global provider of spatial information management (SIM) services
(www.isc-maps.com)
Railroads are a vital part of North America’s freight transportation system. According to the Association of American Railroads (AAR), more than 600 freight railroads operate in Canada, Mexico and the United States on over 173,000 miles of track. ...