碩士 / 國立海洋大學 / 航運技術研究所 / 88 / Geographic Information System (GIS) is a computerized information system that provides user with friendly functions of data query, analysis, access, management and storage as well as the display of real world spatial and non-spatial information.
Recently, many pioneered researchers have focused on the analysis and the display of marine related information with the concepts and tools of GIS. This new research field is so called Marine Geographic Information Systems (MGIS). The Access to the marine related information is much difficult and expensive than the access to those of non-marine information. The fact is more significant to the access to the depth of water. Therefore, the access to the depth of water and accuracy of the data obtained will be one of our main focus in this research.
To a navigator when maneuvering ship in entering a harbor, sufficient depth of water under keel is a vital information to the safety of navigation. The maintainance of quality depth information depends on constant and periodic survey of water depth with accurate positioning and high performance sounding sonar.
In this research, we carried out a hydrographic survey to the Keelung harbor that was troubled by the insufficient depth of water. The work was accomplished by utilizing Swath-Sounding Sonar System (SSSS) that gathers several marine related information such as water depth and characteristics of sea bottom at the same time. We also built up a Spatial Decision Support System (SDSS) to obtain an optimal decision of harbor dredging that can make the depth of water sufficient enough and increase the willings to berth for large vessels under limited fund and resource available. The SDSS consists of two main subsystems MGIS and spatial decision module. In building the Keelung Harbor Marine Geographic Information System, the surveyed data was processed and displayed via Arc-View GIS and Spatial Analysis. The data was then analyzed via a Multiple Objective Decision Making (MODM) technique to obtain an optimal decision of harbor dredging that is to maximize the usage of piers and to maximize the effect of dredging. This research not only provides navigators with safety of navigation but also an optimal decision on harbor dredging under limited fund and rescouce available.
| Identifer | oai:union.ndltd.org:TW/088NTOU0300005 |
| Date | January 2000 |
| Creators | Chin-Cheng Tsai, 蔡金城 |
| Contributors | Min-Der Ko, 柯明德 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 0 |
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