摘要
基于从母体中切割的2070个2′×2′格网数据和83个BJ54与WH54坐标公共点,通过坐标转换和中心点高程拟合计算,构成了“武汉市测量实用工具包”。该工具包的主要内容包括平面转换四参数和高程拟合八参数、三维数据后处理程序以及二维数据计算手簿。精度统计分析结果表明,工具包可以满足GPS-RTK替代Ⅳ等水准测量需求,同时能满足精度不高于四等的平面坐标转换需求。
Based on 2070 2′×2′grid data cut from the Matrix and 83 common points of BJ54 and WH54 coordinates,we used coordinate transformation and central point elevation fitting to construct a“practical tool kit for measurement in Wuhan”.The main contents of the tool kit include four parameters of plane conversion,eight parameters of elevation fitting,3D data post-processing program and 2D data calculation manual book.The result of precision statistical analysis shows that the tool kit can satisfy the demand of GPS RTK replacing leveling survey such as Ⅳ,and the demand of plane coordinate transformation whose precision is not higher than grade Ⅳ.
出处
《地理空间信息》
2021年第8期110-112,I0007,共4页
Geospatial Information
关键词
坐标转换
中心点高程拟合
高程拟合残差
实用工具包
coordinate transformation
central point elevation fitting
elevation fitting residual
practical tool kit
