Guernsey's east coast seabed is being surveyed for depths and contours to update electronic map charts. The survey has been commissioned by Navionics, a manufacturer of electronic navigational ...

There are other types of map that provide a representation of the landscape. Geographical information systems close geographical information system (GIS) Electronic maps with layers added to ...

Marketed and sold by C-MAP Commercial, this professional electronic charting database for the Americas is licensed under companies such as Advanced Maritime Technology, Sperry, Raytheon ...