ANALISIS PERBANDINGAN METODE SCAN TO BUILDING INFORMATION MODELING (BIM) TERKONTROL DAN TIDAK TERKONTROL PADA PEMODELAN TIGA DIMENSI MENGGUNAKAN ALAT TERRESTRIAL LASER SCANNER (TLS)

• Main Author: Abrar Al-arsyi Hendana, Akhmad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/51187
• Institution: Institut Teknologi Bandung

Technological and scientific developments are one of the factors in the growing need for spatial mapping or modeling. One of the things that has developed and started to be applied is mapping or three-dimensional modeling (3D). One of the methods used in modeling is Scan to BIM (Building Information Model) which consists of three main stages, namely preparation, scanning, and data processing. The scanning stage of the scan to BIM modeling can be controlled and uncontrolled. Both have their respective differences in terms of implementation and quality of the data obtained. The purpose of this study was to analyze differences in the implementation and differences in the quality of the results of the controlled and uncontrolled scan to BIM methods. The research began with a reconnaissance survey to the research object area, namely the ITB Research and Innovation Building. Then the control point data was collected using the closed traverse method and differential levelling, and the auxiliary point data using the intersection and trigonometric methods. Control points and auxiliary points are used as tool standpoints when scanning. Point cloud data collection was carried out by controlled and uncontrolled methods using a Terrestrial Laser Scanner (TLS). Data processing for control points and auxiliary points uses the bowditch and least squares adjustment method. Point cloud data is processed through georeferencing, filtering, and registration processes. After that, three-dimensional modeling was carried out referring to the point cloud data that had been processed for final visualization. Based on the research conducted, the uncontrolled scan to BIM method takes longer to implement than the controlled method, with faster data retrieval and longer data processing. Controlled and uncontrolled scan to BIM methods have the same accuracy for point cloud data globally or as a whole. However, controlled scan to BIM has better accuracy for point cloud data accuracy every two points or pair to pair.