NOAA's ENC Direct to GIS web portal provides comprehensive access to display, query, and download all available NOAA ENC data in a variety of GIS/CAD formats for non-navigational purposes using Internet mapping service technology. A sea area where dredged material or other potentially more harmful material, e.g. explosives, chemical waste, is deliberately deposited. (Derived from IHO Chart Specifications, M-4).
The Massachusetts Office of Coastal Zone Management (CZM) downloaded the approach/harbor dumping grounds from NOAA's ENC Direct website on May 21, 2009. The website was up-to-date through April 9, 2009. CZM changed the name of these data from "NOAA ENC Direct to GIS: Dumping Ground" to "Inactive Disposal Sites." CZM projected the data to the Massachusetts State Plane Coordinate System, Mainland Zone (FIPS zone 2001), meters, and removed active dumping grounds.