Two dimensional network adjustment and deformation analysis via MATLAB

Network adjustment and deformation monitoring are one of the main activities of engineering surveying. Geodetic networks are estimated by the method of least-squares estimation (LSE) adjustment and the ‘goodness’ of the network is measured by a precision analysis based upon the covariance matrix of...

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Main Author:	Olyazadeh, Roya
Format:	Thesis
Language:	English
Published:	2010
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/12333/6/RoyaOlyazadehMFKSG2010.pdf
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id	my-utm-ep.12333
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spelling	my-utm-ep.123332017-09-13T04:30:29Z Two dimensional network adjustment and deformation analysis via MATLAB 2010 Olyazadeh, Roya TA Engineering (General). Civil engineering (General) Network adjustment and deformation monitoring are one of the main activities of engineering surveying. Geodetic networks are estimated by the method of least-squares estimation (LSE) adjustment and the ‘goodness’ of the network is measured by a precision analysis based upon the covariance matrix of the estimated parameters. When such a network is designed, global test and local test are assessed to test compatibility of variance factor via two-tailed chi-square distribution and residual of measurements to detect gross error by using a technique pioneered by the geodesist Baarda. The second step is Deformation detection. Generally, the deformation computations can be divided into geotechnical and geodetic methods. There are two types of geodetic networks, namely the absolute and relative networks. In the absolute network, some of the points are assumed to be located out of the deformable body. However, in a relative network, all points are assumed to be located on the deformable body. This study focuses on two dimension (2-D) absolute geodetic deformation detection via MATLAB7. Deformation analysis can be handled by several techniques such as Robust (IWST and LAS), Congruency, Bayesian method and etc. This study presents a deformation analysis procedure via geodetic methods that consists of LSE of individual epochs, trend analysis of the displacement field and the deformation detection by IWST between epochs. This research focuses on the development of two programs in MATLAB7 for network adjustment (distance, angle and azimuth observation respectively) and deformation detection between two epochs. In this project, first LSE adjustment is done for each epoch and creates the appropriate input files for deformation program. Next, deformation program reads them and creates an output file and displays a graphic consists of error ellipse for each stations and displacement vector for moved stations. There are three data sets to run these two programs. For adjustment part the results are compared with STARNET results and for deformation part the results are compared with previous works by Caspary (1987), Ranjit(1999) and Khairulnizam(2004).The results show that these two programs work and there are not significant difference between these results and results from other works. 2010 Thesis http://eprints.utm.my/id/eprint/12333/ http://eprints.utm.my/id/eprint/12333/6/RoyaOlyazadehMFKSG2010.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Geoinformation Science and Engineering Faculty of Geoinformation Science and Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Olyazadeh, Roya Two dimensional network adjustment and deformation analysis via MATLAB
description	Network adjustment and deformation monitoring are one of the main activities of engineering surveying. Geodetic networks are estimated by the method of least-squares estimation (LSE) adjustment and the ‘goodness’ of the network is measured by a precision analysis based upon the covariance matrix of the estimated parameters. When such a network is designed, global test and local test are assessed to test compatibility of variance factor via two-tailed chi-square distribution and residual of measurements to detect gross error by using a technique pioneered by the geodesist Baarda. The second step is Deformation detection. Generally, the deformation computations can be divided into geotechnical and geodetic methods. There are two types of geodetic networks, namely the absolute and relative networks. In the absolute network, some of the points are assumed to be located out of the deformable body. However, in a relative network, all points are assumed to be located on the deformable body. This study focuses on two dimension (2-D) absolute geodetic deformation detection via MATLAB7. Deformation analysis can be handled by several techniques such as Robust (IWST and LAS), Congruency, Bayesian method and etc. This study presents a deformation analysis procedure via geodetic methods that consists of LSE of individual epochs, trend analysis of the displacement field and the deformation detection by IWST between epochs. This research focuses on the development of two programs in MATLAB7 for network adjustment (distance, angle and azimuth observation respectively) and deformation detection between two epochs. In this project, first LSE adjustment is done for each epoch and creates the appropriate input files for deformation program. Next, deformation program reads them and creates an output file and displays a graphic consists of error ellipse for each stations and displacement vector for moved stations. There are three data sets to run these two programs. For adjustment part the results are compared with STARNET results and for deformation part the results are compared with previous works by Caspary (1987), Ranjit(1999) and Khairulnizam(2004).The results show that these two programs work and there are not significant difference between these results and results from other works.
format	Thesis
qualification_level	Master's degree
author	Olyazadeh, Roya
author_facet	Olyazadeh, Roya
author_sort	Olyazadeh, Roya
title	Two dimensional network adjustment and deformation analysis via MATLAB
title_short	Two dimensional network adjustment and deformation analysis via MATLAB
title_full	Two dimensional network adjustment and deformation analysis via MATLAB
title_fullStr	Two dimensional network adjustment and deformation analysis via MATLAB
title_full_unstemmed	Two dimensional network adjustment and deformation analysis via MATLAB
title_sort	two dimensional network adjustment and deformation analysis via matlab
granting_institution	Universiti Teknologi Malaysia, Faculty of Geoinformation Science and Engineering
granting_department	Faculty of Geoinformation Science and Engineering
publishDate	2010
url	http://eprints.utm.my/id/eprint/12333/6/RoyaOlyazadehMFKSG2010.pdf
_version_	1747814925826260992

Two dimensional network adjustment and deformation analysis via MATLAB

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