测绘通报 ›› 2018, Vol. 0 ›› Issue (7): 74-77,91.doi: 10.13474/j.cnki.11-2246.2018.0214

• 技术交流 • 上一篇    下一篇

平面四参数模型下的城市平面坐标与2000国家大地坐标转换方法研究

张海涛, 纪敏   

  1. 广东省国土资源测绘院, 广东 广州 510500
  • 收稿日期:2018-03-29 出版日期:2018-07-25 发布日期:2018-08-02
  • 作者简介:张海涛(1976-),男,高级工程师,主要从事海洋测绘和遥感监测研究与应用。E-mail:332575991@qq.com
  • 基金资助:
    广东省国土资源厅2017年度科研项目(GDGTKJ2017003)

Research on Coordinate Transformation from Local Plane Coordinate System to CGCS2000 Based on Plane Four Parameter Model

ZHANG Haitao, JI Min   

  1. Guangdong Provincial Surveying and Mapping Institute of Land and Resources, Guangzhou 510500, China
  • Received:2018-03-29 Online:2018-07-25 Published:2018-08-02

摘要: 以广东省阳江市为例,充分利用现有成果,基于平面四参数模型对城市坐标系向2000国家大地坐标转换及其优化方法进行研究,考察不同重合点密度对坐标转换精度的影响,并在此基础上探讨了重合点选取的优化方法。研究表明,转换中的点位误差随重合点平均点间距的增加而增加,而在平均点间距达到60 km时,点位误差仍能保持在5 cm以内;同时根据平面上不同坐标系间的线性关系及两方向分量差值平行分布的特性,进行重合点的优化选取,可以快速剔除不可靠的重合点,提高转换精度,特别在已有控制网年代久、精度低、稳定性差的地区可以获得较好的效果。

关键词: 国家2000大地坐标系, 城市平面坐标系, 平面四参数模型, 坐标转换

Abstract: Based on current results in Yangjiang,the paper has discussed the optimal approach of 2 dimensional and 4 parameters coordinate transform from city system to China Geodetic Coordinate System 2000.Focusing on density of common points and its impact on transform,our research has found that transform error is increased with the increase of gaps among common points,but the error can remain within 5 cm when the gaps are less than 60 km.Considering the linear and parallel differences between two corrdinate systems,we can remove common points with blunders and achieve optimal results,which is especially usefull for transform of old,unsteady and degrading network regions.

Key words: CGCS2000, local plane coordinate system, plane four-parameter model, coordinate transformation

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