一种适用于CORS的非实参实时坐标转换方法
A Non-Parametric Real-Time Coordinate Transformation Method Applicable to CORS
唐韬 1姚宜斌 1褚睿韬 1马锦山 2张炯 2李海瑞3
作者信息
- 1. 武汉大学测绘学院,湖北武汉,430079
- 2. 西宁市国土勘测规划研究院有限公司,青海西宁,810008
- 3. 呼和浩特市国土空间规划院,内蒙古呼和浩特,010090
- 折叠
摘要
在实际测绘生产中,使用独立坐标系时由于其保密特性,无法在网络RTK(real-time kinematic)中应用,难以发挥城市连续运行参考站(continuously operating reference sta-tion,CORS)系统实时高精度定位的系统设计要求.本文提出一种通过七参数拟合与格网改正结合方法,将保密的独立坐标系建立要素分解为参数模型与格网模型,进行参数的非实参化达到脱密目的,后续通过CORS系统将与参数对应的格网实时发送至用户实现非实参坐标转换目的,用户可利用该方法实时获取高精度城市独立坐标系坐标.西宁地区CORS实测结果表明,基于该方法获取的地方坐标系成果精度在市区约为0.054 m,整体约为0.022 m,实现了在不显著影响坐标结果的前提下达到保密的要求.
Abstract
In practical surveying production,the use of inde-pendent coordinate systems,due to their confidentiality char-acteristics,cannot be applied in the network RTK (Real time Kinematic)due to their confidentiality characteristics,making it difficult to meet the system design requirements of real-time and high-precision positioning of the Continuous Operating Reference Station (CORS) system in cities. This article pro-poses a method that combines seven parameter fitting and grid correction to decompose the elements of a confidential inde-pendent coordinate system into parameter models and grid models,and non-parameterize the parameters to achieve de-classification. Subsequently,the grid corresponding to the pa-rameters is sent to users in real-time through the CORS sys-tem to achieve non-parametric coordinate conversion. Users can use this method to obtain high-precision urban indepen-dent coordinate system coordinates in real-time. The actual measurement results of CORS in Xining area show that the ac-curacy of the obtained local coordinate system based on this method is about 0.054 m in urban area and 0.022 m in the whole,achieving the requirement of confidentiality without significantly affecting the coordinate results.
关键词
坐标转换/连续运行参考站/独立坐标系Key words
coordinate transformation/CORS/independent coordinate system引用本文复制引用
基金项目
国家重点研发计划(2021YFC3000504)
国家自然科学基金(42304022)
国家自然科学基金(42330105)
出版年
2024
NETL
NSTL
万方数据