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2013. Baldwin Group. This polygon shapefile represents anchorages in the Northeastern United States. The areas described are designated as special anchorage areas for p... Coastal Services Center (U.S.).
2013. Strocko, Ed and United States. Bureau of Transportation Statistics. This polygon shapefile contains United States freight analysis framework (FAF) regions. FAF domestic region level datasets and products provide inf... United States. Bureau of Transportation Statistics.
2013. I.M. Systems Group. This polygon shapefile represents maintained navigation channels in the North Atlantic United States. The condition of navigation channels is repor... United States. National Oceanic and Atmospheric Administration.
2013. Uppal, Danny and California. Department of Transportation. This polygon shapefile contains the boundaries of public use airports in California for 2013. These data were created from California Department of... California. Department of Transportation.