基于Delaunay三角网的大范围GPS坐标转换研究  

The research of large areas GPS coordinate transformation based on Delaunay triangulation

作　　者：梁洪宝[1] 吴向阳[1,2] 王慧青[2] 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]东南大学仪器科学与工程学院,江苏南京210096

出　　处：《测绘工程》2011年第6期12-15,共4页Engineering of Surveying and Mapping

基　　金：国家科技支撑计划重大项目(2006BAJ05A01-04);国土资源部公益性行业科研专项经费项目(200811107)

摘　　要：针对土地监管中大范围区域GPS坐标转换的问题,提出一种基于Delaunay三角网的大范围GPS坐标转换方法。根据土地监管区域的已知控制点构建Delaunay三角网,然后确定待转换点属于哪一个三角形,结合三角形的3个控制点,利用九参数坐标转换模型求解转换参数并转换待转换点。以整个天津市为研究对象,通过BURSA-WOLF模型方法与文中方法的对比,得出结论:文中提出的方法在内符合和外符合精度都优于BURSA-WOLF模型,尤其是内符合精度(2mm以内),保证控制点成果的不变,实现大范围土地监管中坐标系之间的统一。A new method--a way of large areas GPS coordinate transformation based on Delaunay triangula- tion for the problems of large areas GPS coordinate transformation in the land monitoring is proposed. First, the known control points in the land monitoring areas are used for building Delaunay triangulation~ and points to be transformed are determined which of a triangle and transformed to target coordinates by u- sing nine-parameter coordinate transformation model, combined three known control points of determined triangle. The Tianiin is the object of study in this paper. By way of comparison between BURSA-WOLF model and the method proposed in the paper, conclusion that the proposed method is better than BURSA- WOLF model in inner line and outside line precision, especially in inner precision （2 mm or less）, ensuring control points constant and achieving the unity between coordinate systems of continuous network in large land monitoring areas.

关 键 词：DELAUNAY三角网 大范围 坐标转换 土地监管 

分 类 号：P228[天文地球—大地测量学与测量工程]