- 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 routeing measure comprising an area within defined limits where ships must navigate with particular caution and within which the direction of traffic flow may be recommended. (IHO Dictionary, S-32, 5t h Edition, 3982) CZM projected the data to the Massachusetts State Plane Coordinate System, Mainland Zone (FIPS zone 2001), meters.
- NOAA's Ocean Service, Office of Coast Survey (OCS)
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