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3-D Terrain Visualization Database for Highway Information Management; Technical rept. May 98-Aug 99
| 题名： | 3-D Terrain Visualization Database for Highway Information Management; Technical rept. May 98-Aug 99 |
| 作者： | Wang, K. C. P.; Li, D. X. |
| 关键词： | Data bases; Three dimensional; Highways; Terrain; Multimedia; Topography; Images; Synchronism; Information systems; Algorithms; Graphical user interface; Client server network |
| 摘要： | The full digital, computer based Multimedia based Highway Information System (MMHIS) uses technologies of video, multimedia data synchronization, three-dimensional visualization, high-speed networking, and video server. This paper presents the development for the three-dimensional (3-D) terrain visualization user-interface of MMHIS, based on the Application Programming Interface (API) of OpenGL. Digital Elevation Models (DEM) from the US Geological Survey (USGS) were used to construct the 3-D terrain surface of the entire state. A unique picking algorithm was devised to conduct visual queries on the terrain surface of the state. The 3-D user-interface allows the user to zoom, rotate, and pan around the statewide terrain surface for multimedia data query. |
| 总页数： | 46p |
| 报告类型： | 科技报告 |
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