There are different free sources of Official Nautical Charts, usually each country provides the official charts for its territory, but in some cases there is one source for a group of countries. These sources usually store the nautical maps in vector formats, such as ENC and RNC.
Electronic Navigational Charts (ENC) are vector data sets that support all types of marine navigation. Originally designed for large commercial vessels using a sophisticated navigational computer called an Electronic Chart Display and Information System (ECDIS), ENCs are now also being used on simpler electronic chart systems and “chart plotters” on many types of ships and by recreational boaters [NOAA ENC].
Raster Navigational Charts (RNC) are vector data sets used for marine navigation.
The following table shows some of the Official Nautical Chart Sources:
|NOAA Office of Coast Survey||U.S. coasts|
US Virgin Islands
The Hawaiian Island chain
Northern Marianas Islands.
|US Army Corps of Engineers||U.S. inland waterways||ENC, XML|
|Marinha Do Brasil||Brazil|
A part of Antarctica
|LINZ Govt New Zealand||New Zealand|
The South-West Pacific
|East Asia Hydrographic Commission||South China Sea region:|
Democratic People's Republic of Korea,
Republic of Korea,
Singapore and Thailand
|Servicio De Hidrografía Naval||Argentina||RNC|
|Dirección de Hidrografía y Navegación||Peru||RNC|
|Donau River Information Services||Austria||ENC|
|Executive agency for exploration and maintenance of the Danube River||Bulgaria||ENC|
|Voies Navigable de France||France||ENC|
|DANUBE FIS PORTAL||Hungary|
|Flemish RIS Portal||Belgium||ENC|
|Lavdis||The Czech Republic||ENC|
|Port of Switzerland||Switzerland||ENC|
|Urząd Żeglugi Śródlądowej w Szczecinie||Poland||ENC|