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Mathematical Problems in Engineering
Volume 2015, Article ID 610750, 7 pages
http://dx.doi.org/10.1155/2015/610750
Research Article

Fusing Multiscale Charts into 3D ENC Systems Based on Underwater Topography and Remote Sensing Image

1Navigation College, Dalian Maritime University, Dalian 116026, China
2Computer and Information Technology College, Nanyang Normal University, Nanyang 473061, China

Received 6 January 2015; Accepted 26 February 2015

Academic Editor: Luciano Mescia

Copyright © 2015 Tao Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study is to propose an approach to fuse multiscale charts into three-dimensional (3D) electronic navigational chart (ENC) systems based on underwater topography and remote sensing image. This is the first time that the fusion of multiscale standard ENCs in the 3D ENC system has been studied. First, a view-dependent visualization technology is presented for the determination of the display condition of a chart. Second, a map sheet processing method is described for dealing with the map sheet splice problem. A process order called “3D order” is designed to adapt to the characteristics of the chart. A map sheet clipping process is described to deal with the overlap between the adjacent map sheets. And our strategy for map sheet splice is proposed. Third, the rendering method for ENC objects in the 3D ENC system is introduced. Fourth, our picking-up method for ENC objects is proposed. Finally, we implement the above methods in our system: automotive intelligent chart (AIC) 3D electronic chart display and information systems (ECDIS). And our method can handle the fusion problem well.