JSCORS小区域内坐标转换方法的探讨

Discussion on Coordinate Transformation Methods in Small Areas Based on JSCORS

介绍利用JSCORS网络,选用测区附近高级点的精确WGS84坐标和BJ54坐标及高程进行转换,求得七个转换参数,来建立当地的CORS坐标系统,将七参数输入流动站接收机,流动站直接从CORS基站中接收差分信息,经与测区附近高级控制点进行校核达到精度要求后,直接使用流动站进行数据采集,并解算出碎部点的精准平面坐标和高程,提高工作效率。对网络RTK用于常规地形测量及施工放样具有指导意义。

In this paper,the accurate WGS8,BJ54 coordinates and heights of the control points in measuring area are chosen.It makes them convert to get seven switched parameters to create local CORS coordinates system based on JSCORS Network.Putting the seven parameters into a receiver of a mobile station,the mobile station receives the differential messages from the CORS base station,and the authors can acquire the data from the mobile station directly if it meets accuracy requirements through the checking by the senior control points.They can calculate precise plane coordinates and the height of detail points to improve the work efficiency.This method has guiding significance to Network RTK for conventional topographic surveying and construction survey.