Glossary Item Box
The Digital Nautical Chart (DNC®) is a vector based digital product that is designed to provide the mariner with an up-to-date seamless database of the world. Digital Nautical Chart portrays selected significant navigational features in a format suitable for computerized navigation and Geographic Information System (GIS) applications. Digital Nautical Chart is produced in the standard Vector Product Format (VPF) allowing for modeling real world features in digital geographic databases.
The Digital Nautical Chart database is based on and developed from the feature content of NGA and National Ocean Service hard copy charts. The features depicted are thematically organized into 12 layers or coverages including: Cultural Landmarks, Earth Cover, Environment, Hydrography, Inland Waterways, Land Cover, Limits, Aids to Navigation, Obstructions, Port Facilities, Relief, and Data Quality.
Note: The above text was taken from the DNC home page:
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