| OSGEarth的3D场景可视化关键技术实现 |
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| 作者姓名： | 邹进贵 翟若明 |
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| 作者单位： | 武汉大学测绘学院;精密工程与工业测量国家测绘地理信息局重点实验室;测绘国家级实验教学示范中心 |
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| 基金项目： | 国家自然科学基金(41871373)。 |
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| 摘 要： | 针对数字地球的开源框架平台的搭建,研究了OSGEarth数字地球开源库的整体框架、实时地形渲染机制及三维地形场景中的交互响应机制,并结合Qt绘图引擎,设计了基于Qt平台下的数字地球平台,利用该框架实现矢量、影像、高程数据的加载和坐标查询、距离测量、注记符号添加等地理信息查询功能,通过加载Google全球影像与地形数据实现三维地形场景的渲染,实现地理信息查询功能验证了该数字地球平台的可用性,拓展了三维地理信息系统的研究方向。
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| 关 键 词： | 数字地球 OSGEarth QT 地理信息系统 地形渲染 |
Realization of the Key Technology of 3DScene Visualization Based on OSGEarth |
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| Authors: | ZOU Jingui ZHAI Ruoming |
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| Institution: | (School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;Key Laboratory of Precise Engineering and Industry Surveying,National Administration of Surveying,Mapping and Geoinformation,Wuhan 430079,China;Mapping National Experimental Teaching Demonstration Center,Wuhan 430079,China) |
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| Abstract: | To build open source framework of digital earth platform,this paper studies the framework of OSGEarth digital terrestrial open-sourced library,real-time terrain rendering mechanism and interactive response mechanism in 3D terrain scene.Combined with Qt graphics engine,this paper uses the framework to realize the geographic information query function of vector,image,elevation data loading and coordinate query,distance measurement and annotation symbol addition,therefore this paper proves the feasibility of the digital terrestrial platform and provides a new research perspective for 3D GIS(geographic information system).Through loading Google global imagery and terrain data to render 3Dterrain scenes. |
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| Keywords: | digital earth open scene graph(OSG)Earth Qt geographic information system(GIS) terrain rendering |
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