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2. OpenSeaMap - Wikipedia

   en.wikipedia.org/wiki/OpenSeaMap

   Offline Editor JOSM with navigational enhancements JOSM is the default editor for OpenStreetMap. It has been extended for use on navigational charts with a plugin. It is written in Java and runs on multiple desktop platforms [4] To edit you must register with a verified email address. Registration is free and will encourage high data quality.

3. Nautical chart - Wikipedia

   en.wikipedia.org/wiki/Nautical_chart

   Online version of Chart No.1 with "Symbols, Abbreviations and Terms" used in nautical charts; Portolan Chart of Gabriel de Vallseca, 1439; The short film "Reading Charts (April 6, 1999)" is available for free viewing and download at the Internet Archive. Nautical charts available online (Nautical Free) Online Nautical Charts Viewer

4. OpenCPN - Wikipedia

   en.wikipedia.org/wiki/OpenCPN

   OpenCPN (Open Chart Plotter Navigator) is a free software maritime chart plotter and navigation software for use underway or as a planning tool. Developed by a team of active sailors and tested in real world conditions, it has multiple supported chart formats and a variety of data inputs.

5. Comparison of free off-line satellite navigation software

   en.wikipedia.org/wiki/Comparison_of_free_off...

   Very basic programs like this may not be suitable for road navigation in cars, but serve their purpose for navigation while walking or trekking, and for use at sea. To determine the GPS coordinates of a destination, one can use sites such as GPScoordinates.eu and GPS visualizer. Some software presented here is free, but maps may need to be paid ...

6. Electronic navigational chart - Wikipedia

   en.wikipedia.org/wiki/Electronic_navigational_chart

   An Electronic Navigational Chart (ENC) is a digital representation of a real-world geographical area for the purpose of Marine navigation.Real-world objects and areas of navigational significance, or to a lesser degree - informational significance, are portrayed through Raster facsimiles of traditional paper charts; or more commonly through vector images, which are able to scale their relative ...

7. Raster Navigational Charts (NOAA) - Wikipedia

   en.wikipedia.org/wiki/Raster_Navigational_Charts...

   The charts are stored in BSB format. "[The BSB file format] is a proprietary format of BSB Electronic Charts, LLP (bought by MapTech, Inc.)." [ 1 ] Image manipulation tools such as GDAL can read the image information, but there also is georeferenced data in the navigational charts.