| World wind平台地理环境建模方法的研究与改进 |
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| 引用本文： | 王宇,张军,卢虎. World wind平台地理环境建模方法的研究与改进[J]. 计算机工程与应用, 2012, 48(36): 75-79 |
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| 作者姓名： | 王宇 张军 卢虎 |
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| 作者单位： | 空军工程大学 理学院 电子科学系 计算机教研室，西安 710051 |
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| 摘 要： | 介绍了一种对流行地理信息系统三维建模方式的改进算法。对基于地理信息系统二次开发的应用软件需求进行了分析，提出以改进的四叉树算法实现的多层级高程数据瓦片拼接方式替代传统的同层级高程数据瓦片拼接方法来构建地理环境模型。经过实际验证该方法在保证地理环境模型视觉效果没有很大降低的情况下可大幅减少模型总顶点数量进而达到提升场景渲染速度的要求。
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| 关 键 词： | 地理信息系统 数字高程模型（DEM） 四叉树算法 |
Improved plan of physiognomy model building in world wind system recreated |
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| WANG Yu , ZHANG Jun , LU Hu. Improved plan of physiognomy model building in world wind system recreated[J]. Computer Engineering and Applications, 2012, 48(36): 75-79 |
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| Authors: | WANG Yu ZHANG Jun LU Hu |
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| Affiliation: | Teaching and Research Section of Computer Technology, Department of Electronic Science, College of Science, Air Force Engineering University, Xi’an 710051, China |
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| Abstract: | This paper has presented an amendatory arithmetic plan of the 3D model created in a popular GIS system. The needs of GIS system re-create have been analyzed and the model of physiognomy has been built in a new plan about substituting multilevel DEM combination with the amendatory quad-tree for single level DEM combination. Many examinations are testified that the new plan can reduce sum of vertex, accelerate speed of scene protract and keep the quality of vision with physiognomy model. |
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| Keywords: | Geography Information System（GIS） Digital Elevation Model（DEM） quad-tree |
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