| 区域似大地水准面精化的方法探讨与精度分析 |
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| 引用本文： | 布金伟,左小清.区域似大地水准面精化的方法探讨与精度分析[J].测绘工程,2017,26(6). |
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| 作者姓名： | 布金伟 左小清 |
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| 作者单位： | 昆明理工大学 国土资源工程学院,云南 昆明,650093 |
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| 摘 要： | 阐述与GPS/水准高程拟合相关的基本理论及区域似大地水准面精化的原理与方法,并结合区域的具体实例,重点比较二次多项式曲面拟合法、三角剖分双线性内插法、加权平均推估法的精度情况,从中得到结论。实验表明,在没有足够重力数据的支持下,三角剖分双线性内插法获得比较理想的精度,利用该方法精化似大地水准面获得的高程可以代替四等水准。
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| 关 键 词： | GPS/水准 区域似大地水准面 二次多项式曲面拟合法 三角剖分双线性内插法 加权平均推估法 |
Discussion of quasi local level method and its precision analysis |
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| BU Jinwei,ZUO Xiaoqing.Discussion of quasi local level method and its precision analysis[J].Engineering of Surveying and Mapping,2017,26(6). |
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| Authors: | BU Jinwei ZUO Xiaoqing |
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| Abstract: | This paper presents the principle and method of GPS/ leveling fitting the basic theory and the regional quasi geoid.Combined with concrete examples of regional key comparison, two polynomial curve fitting methods: bilinear interpolation method of triangulation, and weighted average push accuracy estimate method are given to obtain some useful conclusions.The experimental result shows that in the absence of sufficient gravity data, triangulation bilinear interpolation can obtain the ideal accuracy,by which the method of refined quasi geoid height can cover the fourth level. |
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| Keywords: | GPS/ level quasi local level two degree polynomial surface fitting method bilinear interpolation method weighted average method |
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