MAP PROJECTIONS AND VISUALIZATION OF NAVIGATIONAL PATHS IN ELECTRONIC CHART SYSTEMS (original) (raw)

Proceedings of 3rd International Conference on Cartography and GIS - 15-20 June, 2010, Nessebar, Bulgaria

The purpose of this paper is twofold: firstly to present the current status and the weaknesses of the standards of the International Maritime Organization (IMO) on the employment of map projections in Electronic Chart Display and Information Systems (ECDIS) and other Electronic Chart Systems (ECS), and secondly to propose specific map projections for use in navigational systems. The paper starts with a brief overview of the IMO performance standards for ECDIS and the corresponding industry practice concerning the use of map projections and the visualization of navigational paths. Seventeen different map projections are evaluated and compared with respect to their fitness for use in the ECDIS/ECS environment. The comparison is supported by specially constructed maps portraying selected loxodromic and orthodromic navigational paths and distortion analysis data. The conducted study shows that improved visual perception is possible through the proper choice among five alternative map projections, depending on the location and the extend of the area portrayed on the chart.

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