You searched for: Author I.M. Systems Group Remove constraint Author: I.M. Systems Group Subject Oceans Remove constraint Subject: Oceans Subject Harbors--Traffic control Remove constraint Subject: Harbors--Traffic control Place Massachusetts Remove constraint Place: Massachusetts Data type Polygon Remove constraint Data type: Polygon
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.