Research on the Helmert Variance Component Estimation
of Adjustment Method for Leveling-Network
Chengdu Institute of Survey and Investigation,70 North-Three Area Yihuan Road, Chengdu 610081, China
Abstract In response to the limitations of traditional weighting methods for leveling-network adjustment in complex areas, this paper establishes a new standard of classification for elevation difference based on the relationship between the observation errors of elevation difference and the hypsography. The calculation formulae for all weights of elevation difference observations are deduced. Then the Helmert variance component estimation is reasonably introduced to match the relationship of weight ratio for elevation difference values. In the end, advantages of the new method were proven with an example
Key words ：
leveling-network
weighting
adjustment
classification
Helmert
Received: 12 August 2014
Published: 10 October 2015
Cite this article:
GONG Shuai,LIU Xiaohua,HUANG Zhiwei et al. Research on the Helmert Variance Component Estimation
of Adjustment Method for Leveling-Network[J]. jgg, 2015, 35(5): 771-774.
GONG Shuai,LIU Xiaohua,HUANG Zhiwei et al. Research on the Helmert Variance Component Estimation
of Adjustment Method for Leveling-Network[J]. jgg, 2015, 35(5): 771-774.
URL:
http://www.jgg09.com/EN/10.14075/j.jgg.2015.05.010 OR http://www.jgg09.com/EN/Y2015/V35/I5/771
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