| 基于二次曲面的Shepard拟合法在GPS水准中的应用 |
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| 引用本文： | 侯本军,钟波,王文庆.基于二次曲面的Shepard拟合法在GPS水准中的应用[J].测绘工程,2007,16(1):36-38. |
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| 作者姓名： | 侯本军 钟波 王文庆 |
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| 作者单位： | 安庆市勘察测绘院,安徽,安庆,246000;武汉大学,测绘学院,湖北,武汉,430079 |
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| 摘 要： | 针对GPS水准中常用拟合方法的不足,给出一种基于二次曲面的Shepard拟合法。通过某测区GPS水准实测数据,采用二次曲面拟合法、Shepard拟合法、多面函数法和基于二次曲面的Shepard拟合法对测区高程异常进行拟合,结果表明,基于二次曲面的Shepard拟合法计算得到的高程异常的精度和可靠性最高。
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| 关 键 词： | GPS水准 高程异常 曲面拟合 |
| 文章编号： | 1006-7949（2007）01-0036-03 |
| 收稿时间： | 2006-09-29 |
| 修稿时间： | 2006年9月29日 |
Application of shepard fitting method based on quadric surface in GPS leveling |
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| HOU Ben-jun,ZHONG Bo,WANG Wen-qing.Application of shepard fitting method based on quadric surface in GPS leveling[J].Engineering of Surveying and Mapping,2007,16(1):36-38. |
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| Authors: | HOU Ben-jun ZHONG Bo WANG Wen-qing |
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| Institution: | 1. Anqing Geotechical and Surveying Institute, Anqing 246003, China; 2. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China |
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| Abstract: | Because of some disadvantages of current methods in GPS leveling, this paper introduces a fitting method-Shepard fitting method based on quadric surface. The fitting methods, such as quadric surface fitting, Shepard curved surface fitting, hardy function interpolation and Shepard fitting method based on quadric surface are used, in approximating height anomaly in a test area. The results show that the precision and reliability of approximating height anomaly by Shepard fitting based on quadric surface are preferable. |
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| Keywords: | GPS leveling height anomaly curved surface fitting |
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