抗差估计结合ObjectARX.NET技术在坐标转换中的应用  

Applied Robust Estimation Combined with ObjectARX.NET Technology in Coordinate Transformation

作　　者：陈浩 岁秀珍 虞献军 楼亨庞 CHEN Hao;SUI Xiuzhen;YU Xianjun;LOU Hengpang(Yiwu Geodetic Digital Surveying and Mapping Co.,Ltd.,Yiwu 322000,China;Yiwu Geomatics Center,Yiwu 322000,China;Yiwu Design and Research Institute of Exploration and Surveying,Yiwu 322000,China)

机构地区：[1]义乌市大地数字测绘有限公司,浙江义乌322000 [2]义乌市地理信息中心,浙江义乌322000 [3]义乌市勘测设计研究院,浙江义乌322000

出　　处：《测绘地理信息》2022年第2期19-22,共4页Journal of Geomatics

基　　金：中国科学院战略性先导科技专项(XDA05050106)。

摘　　要：随着2000国家大地坐标系的启用,需完成坐标转换工作,偏远地区由于控制点稀少,同时在混有异常值的情况下,用经典四参数模型转换时受异常值的影响,转换精度降低。由此在经典四参数模型的基础上采用抗差估计理论,并结合ObjectARX.NET技术,研制基于AutoCAD的坐标转换工具。通过与商业软件对比,该软件能够抵抗异常控制点的影响,提高整体转换精度,对局部缺少转换控制点区域有一定应用价值。With the implementation of China Geodetic Coordinate System 2000,coordinate transformation needed to be completed.When there were few transformation control points in remote areas and outliers were mixed in,the classical four-parameter model transformation was affected by outliers and the conversion accuracy was reduced.Based on the classical four parameter model,the robust estimation theory was proposed,and the coordinate conversion tool based on AutoCAD was developed by combining with ObjectARX.NET technology.Compared with commercial software,this software could resist the influence of abnormal control points,improved the overall conversion accuracy,and had application value in the region lacking of conversion control points.

关 键 词：坐标转换 四参数 抗差估计 OBJECTARX.NET 

分 类 号：P226[天文地球—大地测量学与测量工程]