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Author
I.M. Systems Group
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Subject
Transportation
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Boundaries
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Stanford
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Polygon
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1. North Atlantic Maintained Channels, 2013
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.
2. Marine Transportation, Northeast United States, 2012
2012. I.M. Systems Group. This polygon shapefile represents the geographic location and identity of designated areas used to manage vessel traffic in the northeast United St... United States. National Oceanic and Atmospheric Administration.