Comparison of Horizontal Displacement from Horizontal Control Network Adjustment Result Using Observation Model and Time-Variant Methods (Case Study : Horizontal Control Network of Borobudur Temple, Epoch 2002, 2003 and 2012)

https://doi.org/10.22146/jgise.38472

Een Lujainatul Isnaini(1*), Dwi Lestari(2)

(1) Geodetic Engineering Universitas Gadjah Mada
(2) Geodetic Engineering Universitas Gadjah Mada
(*) Corresponding Author

Abstract


Borobudur Temple is the biggest Buddhist Temple in the world protected by UNESCO. Therefore the periodical maintenance of Borobudur temple become important, deformation study through displacement analysis can be applied for it, by conducting Geodetic observation periodically. The design for Borobudur horizontal monitoring network is a relative one, the control point and monitoring points are in the deformation area. Therefore, the effect of position changes of the control point used in the horizontal network for displacement analysis of Borobudur needs to be considered, as it affects the result for the least square adjustment of the monitoring points. Two different adjustment methods used to overcome this problem, Least square adjustment using observation model and time-variant methods. This research aims to compare the horizontal displacement analysis of Borobudur resulted from these two adjustment methods.  First by giving position correction for the control point at each epoch according to its displacement in least square adjustment using observation model. The second by computing position and velocity vector directly using time-variant method. The comparation of 2D horizontal displacement vector analysis was done by using vector velocity of 2D horizontal displacement from the analysis of the two adjustment methods on the interval displacement epochs between 2002 and 2003 and between 2002 and 2012. This research showed the vector magnitude and the accuration of the displacement from the analysis resulted from the two adjustment methods was different. The resulted of least square adjustment using observation model with correction of control point showed that there was significant increase in magnitude of displacement vector of the monitoring points. Displacement analysis between 2002 and 2003 the magnitude in average were 7.97 mm and the analysis between 2002 and 2012 were 37.78 mmwith consistent displacement direction of the both interval displacement to the northwest. The Time-Variant adjustment method showed an increase in the vector velocity of 2D horizontal displacement from 0.29 mm/year to 0.32 mm/year with different displacement direction. The vector magnitude of the displacement from time variant method was smaller than observation model and the standard deviation for the horizontal displacement from time variant method was slightly bigger about 0.5 mm compared to the observation model.

Full Text:

PDF


References

Apriyanti, D. (2014). ANALISIS PERGESERAN HORISONTAL WADUK SERMO TAHUN 2012-2013 BERDASARKAN HASIL HITUNG PERATAAN PARAMETER BERBOBOT. Skripsi. Universitas Gadjah Mada.

Ghilani, C. (2010). Adjustment Computation Spatial Data Analysis Fifth Edition. New Jersey: Jhon Wiley & Sons, Inc. Hadiman. (1991). Diktat Ilmu Hitung Perataan. Yogyakarta: Jurusan Teknik Geodesi Fakultas Teknik Universitas Gadjah Mada.

Han,. dkk. (2014). Time-Variant Adjustment for a Level Network. American Society of Civil Engineers. Iskandar, H. (2013). ANALISIS KUALITAS DESAIN JARING PEMANTAU HORISONTAL CANDI BOROBUDUR UNTUK STUDI DEFORMASI (KALA PENGAMATAN 2011 DAN 2012). Skripsi, Universitas Gadjah Mada.

Lestari, D. (2015). Analisis Stabilitas Candi Borobudur Berdasar Integrasi Data Pengamatan GPS dan Terestris Jaring Pemantau Deformasi Candi. Disertasi, Universitas Gadjah Mada.

Mikhail , E., & Gracie, G. (1981). Analysis and Adjustment of Survey Measurements. New York: Van Nostrand Reinhold Company.

Salim, A. (2013). Analisis Kualitas Jaring Pantau Vertikal Candi Borobudur Untuk Studi Deformasi. Departemen Teknik Geodesi Fakultas Teknik UGM.

Sari, R. I. (2016). PERBANDINGAN PERGESERAN VERTIKAL HASIL HITUNGAN PERATAAN JARING SIPAT DATAR ANTARA METODE PARAMETER DAN METODE TIME-VARIANT (Studi Kasus: Jaring Pemantau Candi Borobudur). Skripsi. Universitas Gadjah Mada.

Widjajanti, N. (2001). Diktat Deformasi Dasar. Yogyakarta: Departemen Teknik Geodesi Fakultas Teknik Universitas Gadjah Mada.



DOI: https://doi.org/10.22146/jgise.38472

Article Metrics

Abstract views : 124 | views : 155

Refbacks

  • There are currently no refbacks.


Copyright (c) 2018 Author(s)

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Journal of Geospatial Information Science and Engineering (JGISE)

Creative Commons License
The Articles and Contents of this website is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
ISSN: 2623-1182 (Online)
Jl. Grafika No.2 Kampus UGM, Yogyakarta 55281
Email : jgise.ft@ugm.ac.id