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All Journal Elipsoida : Jurnal Geodesi dan Geomatika JGISE-Journal of Geospatial Information Science and Engineering
Mohamad Bagas Setiawan
Universitas Gadjah Mada
Education Engineering

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PEMODELAN TIGA DIMENSI (3D) SALURAN IRIGASI MENGGUNAKAN DATA AIRBORNE LIDAR BATHYMETRY (ALB) DI BENDUNG PEJENGKOLAN, KEBUMEN Mohamad Bagas Setiawan; Istarno Istarno
Elipsoida : Jurnal Geodesi dan Geomatika Vol 2, No 02 (2019): Volume 02 Issue 02 Year 2019
Publisher : Department of Geodesy Engineering, Faculty of Engineering, Diponegoro University,Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/elipsoida.2019.4924

Abstract

Pemerintah Indonesia sedang melakukan kegiatan peningkatan dan pembangunan jaringan irigasi yang ditargetkan selesai pada tahun 2019 (Direktorat Jenderal Sumber Daya Air 2016). Untuk merealisasikan hal tersebut diperlukan metode pengukuran jaringan irigasi secara cepat dan tepat. Salah satu alternatif yang dapat digunakan adalah Airborne LiDAR Bathymetry (ALB). ALB merupakan metode penentuan kedalaman pada perairan jernih dan relatif dangkal seperti dekat pantai dan danau, menggunakan wahana seperti pesawat dengan tinggi terbang rendah serta memancarkan pulsa laser (Guenther 2001). Penelitian ini dilakukan untuk mengkaji model tiga dimensi (3D) yang direpresentasikan dengan Digital Terrain Model (DTM) dari data pengukuran ALB untuk menentukan kedalaman saluran irigasi. Pada penelitian ini, DTM dibentuk dari dua buah sensor yaitu sensor Near InfraRed (NIR) dan sensor hijau pada saluran irigasi primer, sekunder, dan tersier. Model 3D yang dibentuk menggunakan data sensor NIR mewakili tinggi permukaan air pada saluran, sedangkan model 3D yang dibentuk menggukan data sensor hijau mewakili dasar saluran. Dalam proses pembentukan DTM menggunakan data ALB, perlu diperhatikan proses editing data kedalaman berdasarkan dimensi saluran agar diperoleh hasil yang representatif.
Determination of Boiler Building Verticality in Power Plant Construction using Terrestrial Laser Scanner (TLS) Mohamad Bagas Setiawan; Yulaikhah Yulaikhah; Ruli Andaru
Jurnal Geospasial Indonesia Vol 2, No 1 (2019): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgise.40846

Abstract

Nowadays, Indonesian government is focusing on build up infrastructures, especially power plant infrastructures to fulfil electrical energy needs. One of the power plants that will be built up is Waai power plant which located on Waai village, Maluku Province. Waai power plant had been postponed since 2014. In order to build this power plant, the advisability of the building needed to be checked from its verticality level. This level was determined by Terrestrial Laser Scanner (TLS). The TLS’s point clouds were registered using two methods, there are target to target and cloud to cloud methods. There are 65 beams on the power plant boiler building, but only 31 beams that used as the samples to assign the verticality of the boiler construction. The verticality level was set on the X-axis, Y-axis, and the resultant of the X and Y axis by using Pythagoras theorem after the bottom and top coordinates from each beam was determined. The Queensland Building and Construction Admission Standards and Tolerances Guide 2016 was used as tolerance of verticality level. The result of the verticality calculation presented on the X-axis consisted from -0ᵒ 1’ 26,678” to 0ᵒ 4’ 11,778” with the average was 0ᵒ 1’ 40,820” and major direction pointed the positive axis. On the Y-axis, the average was -0ᵒ 0’ 45,772” with -0ᵒ 3’ 33,345” as minimum and 0ᵒ 1’ 25,319” as the maximum and the major direction went to the negative axis. The verticality on the resultant of X and Y axis was from 0ᵒ 0’ 45,225” until 0ᵒ 4’ 15,674” with the average was 0ᵒ 2’ 27,057” and the direction was to the southeast. After the verticality number was compared with the tolerance, the verticality level was smaller than the standard on each beam. From the result, we can conclude that the boiler building on the Waai power plant can be categorized safe to reconstruct.
Co-Authors Istarno Istarno Ruli Andaru Yulaikhah Yulaikhah