顾及拓扑一致性的水系三维曲线化简
发布时间：2018-10-12 18:57
【摘要】：鉴于常规曲线化简方法应用于水系曲线化简时难以顾及水系要素的三维特征及其拓扑关系,本文提出了一种顾及拓扑一致性的水系三维曲线化简方法。该方法首先对D-P算法进行三维扩展,实现水系中单条河流三维曲线化简,然后构建水系树结构表达其拓扑关系,最后按照水系树的层次顺序依次进行河流曲线化简和干流与支流的拓扑关系重构。试验结果表明,该方法化简精度高,既能保持水系的三维形态特征,又能保证河流交汇处的拓扑一致性。
[Abstract]:In view of the fact that it is difficult to take into account the three-dimensional characteristics of water system elements and their topological relations when the conventional curve simplification method is applied to the water system curve simplification, this paper presents a method of water system three-dimensional curve simplification which takes into account the topological consistency. Firstly, the D-P algorithm is expanded to realize the simplification of three-dimensional curves of a single river in the river system, and then the structure of the river tree is constructed to express its topological relationship. Finally, the river curve is simplified and the topological relationship between the main stream and the tributary is reconstructed according to the hierarchical order of the river system tree. The experimental results show that the method has high precision and can not only maintain the three-dimensional morphological characteristics of the river system, but also guarantee the topological consistency of the river interface.
【作者单位】： 南京师范大学地理科学学院;虚拟地理环境教育部重点实验室;江苏省地理信息资源开发与利用协同创新中心;滁州学院地理信息与旅游学院;安徽省地理信息集成应用协同创新中心;
【基金】：国家自然科学基金(41171350;41301514;41501496) 滁州学院校级培育项目(2014PY03)~~
【分类号】：P208
本文编号：2267247
[Abstract]:In view of the fact that it is difficult to take into account the three-dimensional characteristics of water system elements and their topological relations when the conventional curve simplification method is applied to the water system curve simplification, this paper presents a method of water system three-dimensional curve simplification which takes into account the topological consistency. Firstly, the D-P algorithm is expanded to realize the simplification of three-dimensional curves of a single river in the river system, and then the structure of the river tree is constructed to express its topological relationship. Finally, the river curve is simplified and the topological relationship between the main stream and the tributary is reconstructed according to the hierarchical order of the river system tree. The experimental results show that the method has high precision and can not only maintain the three-dimensional morphological characteristics of the river system, but also guarantee the topological consistency of the river interface.
【作者单位】： 南京师范大学地理科学学院;虚拟地理环境教育部重点实验室;江苏省地理信息资源开发与利用协同创新中心;滁州学院地理信息与旅游学院;安徽省地理信息集成应用协同创新中心;
【基金】：国家自然科学基金(41171350;41301514;41501496) 滁州学院校级培育项目(2014PY03)~~
【分类号】：P208
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