Nautical charts are essential tools for martime navigation and therefore a key to safe navigation. These charts are standardized by the International Hydrographic Organization (IHO), which means that cartographic symbols, chart frames, chart content, etc. are predefined. Publication of Symbols and abbreviations used for producing of Slovenian nautical charts was published by the Ministry of Infrastructure, formerly known as Ministry of Transport, in 2000. Nautical charts are produced in different scales, depending on the focus area. Large scale charts provide a more detailed view of water depth, nature of seabed, and coastline characteristics. The main source for this chart was the national orthophoto. The final product is an updated and ready-to-print nautical chart of Marina Portorož.
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