| 基于速度场模型的区域CGCS2000坐标实时转换 |
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| 引用本文： | 严剑锋,王英刚.基于速度场模型的区域CGCS2000坐标实时转换[J].北京测绘,2021,35(1):78-82. |
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| 作者姓名： | 严剑锋 王英刚 |
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| 作者单位： | 南京市不动产登记中心,江苏南京210005;南京市不动产登记中心,江苏南京210005 |
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| 基金项目： | "世景杯"第二届全国注册测绘师获奖论文 |
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| 摘 要： | 从WGS84到CGCS2000的坐标转换,涉及坐标框架转换和历元转换两个问题。如何提高大区域坐标转换精度,是一直以来的研究热点,针对大区域坐标转换精度较低的问题,考虑历元转换,提出融合速度场改正信息的坐标转换方法。该方法对建立速度场改正模型进行了研究,分析比较了各模型的精度和可靠性,在此基础上选择一种模型用于实现CGCS2000坐标实时转换。实例表明,该转换方法不受区域范围的影响,精度高且误差在各方向上都分布均匀。
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| 关 键 词： | 2000国家大地坐标系(CGCS2000) 坐标框架 速度场模型 |
Real-time Conversion of Regional CGCS2000 Coordinates Based on Spatial Velocity Field Model |
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| YAN Jianfeng,WANG Yinggang.Real-time Conversion of Regional CGCS2000 Coordinates Based on Spatial Velocity Field Model[J].Beijing Surveying and Mapping,2021,35(1):78-82. |
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| Authors: | YAN Jianfeng WANG Yinggang |
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| Institution: | (Registration of Real Estate in Nanjing City,Nanjing Jiangsu 210005,China) |
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| Abstract: | The coordinate transformation from WGS84 to CGCS2000 involves two problems of coordinate frame conversion and epoch conversion.How to improve the precision of coordinate transformation in large area is always a research hotspot.A coordinate conversion method of merging velocity correction information is proposed.The method is aimmed at the low accuracy of coordinate conversion in large areas.Firstly,velocity field model has been studied based on analysis on the precision and reliability of the model.Secondly,a model has been selected to realize CGCS 2000 coordinate real-time conversion.The experiment shown high-accuracy and uniform distribution of the error in all directions.Besides,the conversion method is not affected by the regional scope. |
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| Keywords: | China Geodetic Coordinate System 2000(CGCS2000) coordinate frame velocity field model |
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