Perpustakaan Digital ITB

Measurement by geodetic method can be used for the determination of deformation on an object or area. One of the geodetic methods that can be used in the measurement of deformation is Terrestrial Laser Scanner (TLS) episodic. Episodic TLS is a measurement method for determining the three-dimensional position of an object (in a particular coordinate system) which is performed several times of measurement with a certain period. The final task study aims to determine the size of deformation in the Sidoarjo mud area using episodic TLS data. In addition, TLS data in Musi Banyuasin is also used for simulation deformation measurements, where calculation of yield difference between two filtering methods (manual and automatic) is used. The result both of the LUSI episodic TLS data processing and the Musi Banyuasin TLS data processing show that value of the deformation and value of simulated deformation can be obtained with the precision up to centimeter. The deformation in the area of LUSI caldera vary spatially by -0.5 to 1 meter. In the TLS simulation data, the measurement by the point to point method resulted in average value of the deformation result of 5.8 to 11.4 cm and the surface to surface method yielded an average value of the deformation result of 4.5 to 19.1 cm. The difference in outcomes between the two deformation measurement methods is 0.1 to 9.7 cm. Pengukuran dengan metode geodetik dapat digunakan untuk penentuan deformasi pada suatu objek atau area. Salah satu metode geodetik yang dapat digunakan pada pengukuran deformasi yaitu Terrestrial Laser Scanner (TLS) episodik. TLS episodik merupakan metode pengukuran untuk menentukan posisi tiga-dimensi suatu objek (dalam sistem koordinat tertentu) yang mana dilakukan beberapa kala pengukuran dengan periode tertentu. Penelitian tugas akhir bertujuan untuk menentukan besar deformasi pada kawasan lumpur Sidoarjo menggunakan data TLS episodik. Selain itu, digunakan juga data TLS di Musi Banyuasin untuk pengukuran besar deformasi simulasi, dimana dilakukan perhitungan selisih hasil antara dua metode filtering (manual dan otomatis). Hasil pengolahan data TLS episodik LUSI dan data TLS di Musi Banyuasin menunjukan bahwa informasi besar deformasi dan besar deformasi simulasi dapat diperoleh ketelitian hingga level sentimeter. Besar deformasi pada kawasan kaldera LUSI bervariasi secara spasial sebesar -0,5 hingga 1 meter. Pada data TLS di Musi Banyuasin, pengukuran dengan metode point to point menghasilkan nilai deformasi simulasi sebesar 5,8 sampai 11,4 cm dan metode surface to surface menghasilkan nilai deformasi simulasi sebesar 4,5 sampai 19,1 cm. Perbedaan hasil antar kedua metode pengukuran deformasi simulasi sebesar 0,1 hingga 9,7 cm. Measurement by geodetic method can be used for the determination of deformation on an object or area. One of the geodetic methods that can be used in the measurement of deformation is Terrestrial Laser Scanner (TLS) episodic. Episodic TLS is a measurement method for determining the three-dimensional position of an object (in a particular coordinate system) which is performed several times of measurement with a certain period. The final task study aims to determine the size of deformation in the Sidoarjo mud area using episodic TLS data. In addition, TLS data in Musi Banyuasin is also used for simulation deformation measurements, where calculation of yield difference between two filtering methods (manual and automatic) is used. The result both of the LUSI episodic TLS data processing and the Musi Banyuasin TLS data processing show that value of the deformation and value of simulated deformation can be obtained with the precision up to centimeter. The deformation in the area of LUSI caldera vary spatially by -0.5 to 1 meter. In the TLS simulation data, the measurement by the point to point method resulted in average value of the deformation result of 5.8 to 11.4 cm and the surface to surface method yielded an average value of the deformation result of 4.5 to 19.1 cm. The difference in outcomes between the two deformation measurement methods is 0.1 to 9.7 cm.