Nearshore Ocean Management Planning Area Boundary (NOMPAB) - Commonwealth of Massachusetts

This data set contains the nearshore boundary line, in ESRI shape file format, for the Ocean Management Planning Area pursuant to "An Act Relative to Oceans" for the Commonwealth of Massachusetts. The Nearshore Ocean Management Planning Area Boundary (NOMPAB) line defines the landward limit of the Ocean Management Planning Area and represents the merger of a line projected 0.3 nautical miles (nm) from an approximate mean high water (MHW) shoreline data set and closing lines digitized manually to ensure that most developed coastal embayments, ports, harbors, etc. are located landward of the nearshore boundary. GIS files for this boundary are available for download. Since GIS projection and topology functions can alter or generalize coordinates, however, calculated coordinate values (also available for download) and not GIS files are the official record for the exact NOMPAB.