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。
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.
出处
《计算机工程与应用》
CSCD
2012年第36期75-79,共5页
Computer Engineering and Applications
基金
国家自然科学基金(No.61174194)
