||Admiralty Charts and Publications
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This encoding guide was released with the intention to provide users of the electronic charts with the detailed guidance on what exactly is necessary to produces a good uniform and consistent IENC. For all of the classes and attributes together with their values used with an IENC, this guide will provide a basis for its establishment, and also provide description of its relationship to the real life entity. The book will also provide required criteria for the proper use of inland ENC and give the specific examples of encoding supplemented with the graphic data. The guide covers all minimum objects to be contained in IENC, such as the waterway bank, channel boundaries, isolated dangers, officially released aids to navigation, contours of the existing dams and locks, waterway axis etc. In addition to all above requirements, the present guide covers recommended objects, plus attributes and values considered suitable for any IENC worldwide. Each country or geographical region defines which of them will be necessary to meet local requirements. Note that this is a living document; it means that its content is subject to modifications done in order to accommodate the development of the future IENC. Two fundamental procedures have been established to making the amendments to this title, the one addresses the proposals for new and copied object classes/attributes/attribute values while the second one covers other changes.