International hydrographic Organization
The international hydrographic Organization (OHI) is an advisory and technical intergovernmental organization, established by a convention signed in Monaco on May 3rd, 1967 coming into effect in 1970.
The OHI concretizes a co-operation started at the beginning of the 20th century between the States which had a capacity to carry out hydrographic surveys and to publish sea charts. In 2006, the International Hydrographic Organization counted 77 members.
Objectives of the OHIThe objectives of the OHI are:
- the coordination of the activities of the national hydrographic services;
- standardization of the sea charts and the nautical documents;
- adoption of effective and reliable methods to carry out and exploit the hydrographic surveys;
- the development of sciences concerned with the field of the hydrography and the techniques of descriptive oceanography.
Principal bodyThe principal body of the OHI is the International Hydrographic Bureau (BHI), based in Monaco.
ActivitiesAt one time centered primarily on the development of the co-operation and the standardization of the documents " papier" (charts and works), the activity of the OHI was centred towards the end of the 20th century towards the definition and the standardization of the electronic charts, numerical products intended to replace the traditional sea charts.
The OHI was thus the framework of the development of the standard S-57 (of the name of the document which defines it, the Special Publication N° 57 of the OHI), which must respect the numerical sea charts, or electronic charts of navigation ( ENC , for Electronic Navigation Charts) in " mode; vecteur". These ENC are in particular used in the display systems of the electronic charts and information (Electronic Chart Display and Information System, or ECDIS ).
The standard S-61 corresponds to the system of chart electronic RNC (Charts of Raster navigation). another type of charts corresponding to a digitalization of the chart paper (matric chart).
- the International Hydrographic Office
- International The Hydrographic Organization (IHO)
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