Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi

This study was conducted in conjunction with development of Peninsular Malaysia hybrid geoid model using new method called Least Square Modification of Stoke’s formula with Additive Corrections (LSMSA) or simply KTH method. The model were develop using latest terrestrial with airborne gravity inform...

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Main Author:	Ahmad Halmi, Ahmad Hafizul Zariq
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Aerial geography Geomatics
Online Access:	https://ir.uitm.edu.my/id/eprint/30329/1/TD_AHMAD%20HAFIZUL%20ZARIQ%20AHMAD%20HALMI%20AP%20R%2019_5.pdf
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id	my-uitm-ir.30329
record_format	uketd_dc
spelling	my-uitm-ir.303292020-04-30T13:29:36Z Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi 2020-05-30 Ahmad Halmi, Ahmad Hafizul Zariq Aerial geography Geomatics This study was conducted in conjunction with development of Peninsular Malaysia hybrid geoid model using new method called Least Square Modification of Stoke’s formula with Additive Corrections (LSMSA) or simply KTH method. The model were develop using latest terrestrial with airborne gravity information provided by Department of Survey & Mapping Malaysia (DSMM), newly established digital elevation model TanDEMX90 GDEM, GOCO01S global geopotential model (GGM), marine gravity anomalies from DTU10 Global Gravity Field with additional ship-track gravity data and Earth’s gravity anomalies from WGM2012. Primary objective of this study is to assess how far the chosen GDEM could provide any difference towards geoid modelling computation. As for comparison purpose, another geoid model based on SRTM30 GDEM also being computed in this study. After that, the gravimetric geoid model developed will be fit to Malaysia NGVD surface to establish a hybrid geoid model of Peninsular Malaysia. Both models derived then being assessed with GNSS/Levelling data for geoid height comparison. For gravimetric geoid model, SRTM30-based model shown better RMSE than TanDEMX90-based model. SRTM30-based model achieves RMSE of 0.357m before fitting and 0.068m after fitting while TanDEMX90-based model reach RMSE of 0.356m before fitting and 0.074m after fitting. For hybrid geoid model, the difference occurs with TanDEMX90-based model shown slightly better result than SRTM30-based model with external RMSE of 0.070m and 0.077m, respectively. 2020-05 Thesis https://ir.uitm.edu.my/id/eprint/30329/ https://ir.uitm.edu.my/id/eprint/30329/1/TD_AHMAD%20HAFIZUL%20ZARIQ%20AHMAD%20HALMI%20AP%20R%2019_5.pdf text en public degree Universiti Teknologi Mara Perlis Faculty of Architecture, Planning and Surverying (R)
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
topic	Aerial geography Geomatics
spellingShingle	Aerial geography Geomatics Ahmad Halmi, Ahmad Hafizul Zariq Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi
description	This study was conducted in conjunction with development of Peninsular Malaysia hybrid geoid model using new method called Least Square Modification of Stoke’s formula with Additive Corrections (LSMSA) or simply KTH method. The model were develop using latest terrestrial with airborne gravity information provided by Department of Survey & Mapping Malaysia (DSMM), newly established digital elevation model TanDEMX90 GDEM, GOCO01S global geopotential model (GGM), marine gravity anomalies from DTU10 Global Gravity Field with additional ship-track gravity data and Earth’s gravity anomalies from WGM2012. Primary objective of this study is to assess how far the chosen GDEM could provide any difference towards geoid modelling computation. As for comparison purpose, another geoid model based on SRTM30 GDEM also being computed in this study. After that, the gravimetric geoid model developed will be fit to Malaysia NGVD surface to establish a hybrid geoid model of Peninsular Malaysia. Both models derived then being assessed with GNSS/Levelling data for geoid height comparison. For gravimetric geoid model, SRTM30-based model shown better RMSE than TanDEMX90-based model. SRTM30-based model achieves RMSE of 0.357m before fitting and 0.068m after fitting while TanDEMX90-based model reach RMSE of 0.356m before fitting and 0.074m after fitting. For hybrid geoid model, the difference occurs with TanDEMX90-based model shown slightly better result than SRTM30-based model with external RMSE of 0.070m and 0.077m, respectively.
format	Thesis
qualification_level	Bachelor degree
author	Ahmad Halmi, Ahmad Hafizul Zariq
author_facet	Ahmad Halmi, Ahmad Hafizul Zariq
author_sort	Ahmad Halmi, Ahmad Hafizul Zariq
title	Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi
title_short	Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi
title_full	Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi
title_fullStr	Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi
title_full_unstemmed	Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi
title_sort	hybrid geoid modelling using tandemx dem / ahmad hafizul zariq ahmad halmi
granting_institution	Universiti Teknologi Mara Perlis
granting_department	Faculty of Architecture, Planning and Surverying (R)
publishDate	2020
url	https://ir.uitm.edu.my/id/eprint/30329/1/TD_AHMAD%20HAFIZUL%20ZARIQ%20AHMAD%20HALMI%20AP%20R%2019_5.pdf
_version_	1783734085959548928

Hybrid geoid modelling using tandemX DEM / Ahmad Hafizul Zariq Ahmad Halmi

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