TOWARDS THE IMPLEMENTATION OF SEMI-DYNAMIC DATUM FOR MALAYSIA
| Autor: | Kamaludin Mohd Omar, Zulkarnaini Mat Amin, J. Gill, N. S. Shariff |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
lcsh:Applied optics. Photonics
010504 meteorology & atmospheric sciences Computer science Epoch (reference date) business.industry lcsh:T Bilinear interpolation Geodetic datum lcsh:TA1501-1820 010502 geochemistry & geophysics Geodesy 01 natural sciences lcsh:Technology Transformation (function) lcsh:TA1-2040 Global Positioning System business lcsh:Engineering (General). Civil engineering (General) 0105 earth and related environmental sciences |
| Zdroj: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLII-4-W5, Pp 185-199 (2017) |
| ISSN: | 2194-9034 1682-1750 |
| Popis: | A semi-dynamic datum provides positions with respect to time while taking into account the secular and non-secular deformations, making it the best approach to adapt with the dynamic processes of the earth. Malaysia, as yet, employs a static datum, i.e., GDM2000, at epoch 2000; though Malaysia has evidently been affected by seismic activity for the past decade. Therefore, this paper seeks to propose a design for implementing a semi-dynamic datum for Malaysia. Methodologically, GPS time series analyses are carried out to investigate the seismic activity of Malaysia, which essentially contributes to the proposed design of the semi-dynamic datum for Malaysia. The implications of implementing a semi-dynamic datum for Malaysia are discussed as well. The results indicate that Malaysia undergoes a complex deformation; whereby the earthquakes – primarily the 2004 Sumatra-Andaman, 2005 Nias and 2012 Northern Sumatra earthquakes – have affected the underlying secular velocities of Malaysia. Consequently, from this information, the proposed design, particularly the secular and non-secular deformation models, is described in detail. The proposed semi-dynamic datum comprises a transformation, temporal, and spatial module, and utilizes a bilinear interpolation method. Overall, this paper aims to contribute to the feasibility of a semi-dynamic datum approach for Malaysia. |
| Databáze: | OpenAIRE |
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