| GIS叠置后同名点元不确定性的严密估计 |
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| 引用本文： | 魏峰远,崔铁军.GIS叠置后同名点元不确定性的严密估计[J].测绘科学技术学报,2006,23(1):56-58. |
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| 作者姓名： | 魏峰远 崔铁军 |
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| 作者单位： | 信息工程大学,测绘学院,河南,郑州,450052;河南理工大学,河南,焦作,454100;信息工程大学,测绘学院,河南,郑州,450052 |
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| 摘 要： | 基于最小二乘估计理论,建立了更加合理的GIS多层叠置同名点元的不确定性估计模型,改善了叠置点的精度.得出的单位权方差估计公式,理论上符合在一个平差系统中,其母体单位权方差应具有唯一性的要求.从理论和实例两方面验证了当同层内观测数据精度相同时,经多层叠置后各点精度均相同的结论.
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| 关 键 词： | GIS叠置 不确定性 同名点元 最小二乘平差 |
| 文章编号： | 1673-6338（2006）01-0056-03 |
| 收稿时间： | 2005-09-15 |
| 修稿时间： | 2005-12-05 |
The Uncertainty Estimation of Corresponding Points in GIS Overlay |
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| WEI Feng-yuan,CUI Tie-jun.The Uncertainty Estimation of Corresponding Points in GIS Overlay[J].Journal of Zhengzhou Institute of Surveying and Mapping,2006,23(1):56-58. |
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| Authors: | WEI Feng-yuan CUI Tie-jun |
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| Institution: | 1 ,Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052 ,China; 2 ,Henan Polytechnic University, Jiaozuo 454100 ,China |
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| Abstract: | Based on the theory of least squares estimation, this paper establishes more reasonable uncertainty estimation model for corresponding points in GIS overlay, improves the accuracy of overlay points, derives the formula of unit weight variance which meets the unique of unit weight variance in one adjustment system. When the accuracy of observation data is the same, the conclusion that each point has the same accuracy in GIS overlay is validated by theory and example. |
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| Keywords: | GIS overlay uncertainty corresponding points least squares adjustment |
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