A 3-D Terrain Visualization Database for Highway Information Management

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University of Arkansas, Mack-Blackwell National Rural Transportation Study Center, 1999 - Highway communications - 54 pages
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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 U.S. 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.

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Contents

Data Sources and Data Preparation for the 3D Visualization
5
Conclusions
16
User Selectable Tuming Movements
19

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