Digital Nautical Chart
(DNC) Description: Digital Nautical Chart is a Vector Product Format (VPF)
based database containing maritime
features of digitally replicated
Nautical Charts derived from the
National Geospatial-Intelligence Agency's (NGA) hard
copy of Coastal Charts,
Approach Charts, Harbor Charts and General Charts for supporting geographic information systems
(GIS) such as our 3D GPS tracking Global
Mapper and worldwide marine
navigation systems. NGA responsible for the Digital Nautical Chart
or marine navigation chart, maintenance and VPF updates, is derived from
approximately 5,000 charts divided into 29
Geographic Regions and currently available via the NGA
Gateway or on
CD-ROM version. Digital Nautical Chart approved format
VPF was chosen for ease of data manipulation and less data disk storage
while allowing hyper linking to various data in simplicity viewing.
The database features organized into 12
layers or coverages including:
Global Mapper v6.00 and above can load files in
this VPF format, either select the dht file at the root of
the VPF database tree or select the lht file
at a lower level to load just one coverage
from the database (latter option is
usually useful for Digital
Nautical Charts).
Available
for free? Yes.
Web
Pages and FTP Sites:
Digital
Nautical Chart Homepage
NGA
Digital Nautical Charts
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