碩士 / 國立中山大學 / 海洋環境及工程學系 / 87 / Since 1994 Taiwan government spends a lot of money on allocating artificial reefs (AR) in order to improve fishery resources. But the information regarding to the position, orientation and its change of the AR was lack. It is very hard to use ROV or divers to view the distribution of artificial reefs. The visibility around western Taiwan coast is very limited. Therefore, we need a better navigation tool to guide ROV or divers.
This thesis uses high density multibeam echo sounding data to calculate the position and orientation angle, and then builds a virtual environment for AR. First, we use depth difference between consecutive neighbor soundings in a profile together with slope to separate the sounding data on top of AR or sea bottom. Soundings belong to the same AR were detected and grouped. Finally, center and orientation angle were calculated.
Sense 8 WorldUP was used to build a virtual environment. First, We use DGM3 to get 2.5D depth grid data and import it to this virtual environment. Because the size of AR is known, we use 3D Studio software to build it as an object. And then insert this object into WorldUP. Therefore, we can fly through this virtual environment.
This study successfully identified the soundings on the top of AR and sea bottom terrain. It is also found that correctness of calculated position and orientation of an AR is highly depending on the distribution of multibeam data on the AR surface.
| Identifer | oai:union.ndltd.org:TW/087NSYSU282012 |
| Date | January 1999 |
| Creators | Chieh-chiang Huang, 黃界強 |
| Contributors | Shiahn-wern Shyue, 薛憲文 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 60 |
Page generated in 0.002 seconds