engleski

INTEGRATION OF THE LAND AND MARINE SPATIAL DATA ON THE CROATIAN COASTLINE

Every maritime country has its coastal zone, which is differently defined in terms of different professions. As a physical-geographical term, coast is a part of the land in occasional contact with the sea. Coast is therefore not a line but a belt, either wider or narrower, depending on the slope of the land and the range of sea level oscillations. Because of the sea-land interaction in the coastal belt, the spatial data in that area are interconnected, usually being examined, represented or used together. Boundary between the sea and land, as shown on nautical charts and topographic maps, is not the coast but the coastline. Land data (State Geodetic Administration) and marine data (Hydrographic offices) are usually represented by means of different coordinate systems, different projections, different datums (horizontal and vertical) and differents scales, to show different contents. As a result, users are not able to refer to the required object in the coastal area in a simple and consistent way. The national spatial data infrastructure (NSDI) should therefore (like in other countries) integrate land data with marine data, defining the marine spatial data infrastructure (MSDI). Integration of the land and marine data is becoming a serious problem for many countries, and just a few of them have solved it , each in its own way. This paper presents the activities of the Hydrographic Institute of the Republic of Croatia on the integration of the land and marine spatial informations and the possibilities of its implementation in Croatia.

nautical charts; topographic maps; coastline; MSDI; Croatia

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