| 关于“新的点位误差度量”的讨论 |
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| 引用本文： | 杨元喜.关于“新的点位误差度量”的讨论[J].测绘学报,2009,38(3). |
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| 作者姓名： | 杨元喜 |
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| 作者单位： | 西安测绘研究所,陕西,西安,710054 |
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| 摘 要： | 多维点位误差度量应该反映点的位置的不确定度,它可以是方差或方差的某种函数.实践中,有多种点位误差的表示形式,不同的表示形式有不同的几何意义或概率意义.文献1]提出采用坐标分量方差的均值作为点位误差的度量.为了将其与现有点位误差度量进行比较,本文列出4种点住误差度量表达式,并讨论了它们的几何意义.强调指出,点位误差度量的具体数值应大于等于最大可能的误差,以保证用户使用数据的安全性.
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| 关 键 词： | 点位误差 坐标分量误差 坐标分量平均方差 误差椭球 |
Discussion on "A New Measure of Positional Error" |
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| YANG Yuanxi.Discussion on "A New Measure of Positional Error"[J].Acta Geodaetica et Cartographica Sinica,2009,38(3). |
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| Authors: | YANG Yuanxi |
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| Institution: | YANG Yuanxi Xi'an Research Institute of Surveying , Mapping,Xi'an 710054,China |
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| Abstract: | The measure of multi-dimensional position should reflect the uncertainty of the coordinate.It could be the variances of the coordinate components or their functions.In practice,there are a few measures for evaluating the position uncertainty.Different expressions coincide with different geometrical or stochastic meanings.A different measure which uses the average of the variances of coordinate components for evaluating the positional uncertainty is proposed in the reviewed paper 1].In order to compare the ... |
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| Keywords: | positional error coordinate component error average variance of coordinate components error ellipsoid |
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