Height modernization using fitted geoid models and myrtknet

The purpose of this study is to examine the strategies for rapid height determination using the current Global Positioning System (GPS) technology. With steady economic growth in Malaysia since 1998, more highways, federal and states road have been built or have been widen. These development process...

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Main Author:	Nordin, Soeb
Format:	Thesis
Language:	English
Published:	2009
Subjects:	T Technology (General)
Online Access:	http://eprints.utm.my/id/eprint/12423/1/SoebNordinMFKSG2009.pdf
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id	my-utm-ep.12423
record_format	uketd_dc
spelling	my-utm-ep.124232018-06-04T09:54:03Z Height modernization using fitted geoid models and myrtknet 2009-08 Nordin, Soeb T Technology (General) The purpose of this study is to examine the strategies for rapid height determination using the current Global Positioning System (GPS) technology. With steady economic growth in Malaysia since 1998, more highways, federal and states road have been built or have been widen. These development processes have somehow destroyed, damaged or disturbed the levelling benchmarks located along the routes. Currently the conventional method to require the levels of these benchmarks is costly and time-consuming. This study focuses on the theory, computation method and analysis of WMGeoid04 and WMGeoid06A revised models using GPS Virtual Reference Stations (VRS) technique for rapid height determination. The computation of WMGeoid04 and WMGeoid06A precise fitted geoid models was based on least squares collocation using the existing gravimetric geoid and newly observed geometric geoid separation. Analysis of the precise fitted geoid models have shown that the formal fitting errors were less than 4 cm. In addition, the validation process with external data sets has achieved 5 cm accuracy in terms of Root Mean Square (RMS). Assessment of GPS station coordinate consistency indicates the achievable accuracy (at 95% confidence region) from VRS technique is better than 3 cm horizontally, and better than 6 cm vertically. Further analysis using orthometric height comparison between published and derived height of levelling benchmarks using the combination of fitted geoid models with VRS technique have shown that the differences are better than 6 cm. The results showed that GPS levelling with precise fitted geoid model and VRS technique is relatively better than second class levelling survey at a lesser cost and time, and could be used to update existing levelling benchmark and establishing a new levelling routes in Malaysia. 2009-08 Thesis http://eprints.utm.my/id/eprint/12423/ http://eprints.utm.my/id/eprint/12423/1/SoebNordinMFKSG2009.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	T Technology (General)
spellingShingle	T Technology (General) Nordin, Soeb Height modernization using fitted geoid models and myrtknet
description	The purpose of this study is to examine the strategies for rapid height determination using the current Global Positioning System (GPS) technology. With steady economic growth in Malaysia since 1998, more highways, federal and states road have been built or have been widen. These development processes have somehow destroyed, damaged or disturbed the levelling benchmarks located along the routes. Currently the conventional method to require the levels of these benchmarks is costly and time-consuming. This study focuses on the theory, computation method and analysis of WMGeoid04 and WMGeoid06A revised models using GPS Virtual Reference Stations (VRS) technique for rapid height determination. The computation of WMGeoid04 and WMGeoid06A precise fitted geoid models was based on least squares collocation using the existing gravimetric geoid and newly observed geometric geoid separation. Analysis of the precise fitted geoid models have shown that the formal fitting errors were less than 4 cm. In addition, the validation process with external data sets has achieved 5 cm accuracy in terms of Root Mean Square (RMS). Assessment of GPS station coordinate consistency indicates the achievable accuracy (at 95% confidence region) from VRS technique is better than 3 cm horizontally, and better than 6 cm vertically. Further analysis using orthometric height comparison between published and derived height of levelling benchmarks using the combination of fitted geoid models with VRS technique have shown that the differences are better than 6 cm. The results showed that GPS levelling with precise fitted geoid model and VRS technique is relatively better than second class levelling survey at a lesser cost and time, and could be used to update existing levelling benchmark and establishing a new levelling routes in Malaysia.
format	Thesis
qualification_level	Master's degree
author	Nordin, Soeb
author_facet	Nordin, Soeb
author_sort	Nordin, Soeb
title	Height modernization using fitted geoid models and myrtknet
title_short	Height modernization using fitted geoid models and myrtknet
title_full	Height modernization using fitted geoid models and myrtknet
title_fullStr	Height modernization using fitted geoid models and myrtknet
title_full_unstemmed	Height modernization using fitted geoid models and myrtknet
title_sort	height modernization using fitted geoid models and myrtknet
granting_institution	Universiti Teknologi Malaysia, Faculty of Geoinformation Science and Engineering
granting_department	Faculty of Geoinformation Science and Engineering
publishDate	2009
url	http://eprints.utm.my/id/eprint/12423/1/SoebNordinMFKSG2009.pdf
_version_	1747814936414781440

Height modernization using fitted geoid models and myrtknet

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