ANALISIS TINGKAT KEPRESISIAN POINT CLOUDS DENGAN METODE PENGIKATAN TERHADAP JARING TITIK KONTROL TANAH DAN TITIK BANTU

• Main Author: Ihsan Habibi, M
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/39780
• Institution: Institut Teknologi Bandung

The implementation of survey and mapping activities is inseparable from binding the coordinates to the ground control point frameworks net so the coordinates refer to a reference system. There are several problems that occur in the process of binding coordinates to benchmarks or framework nets, such as the example of 3D scanning activities using TLS in a multi-storey building. The process of binding to ground control point nets is usually difficult to do because control point nets cannot be seen inside the buildings. The solution to overcome this problem is to hold an auxiliary tie point. Auxiliary tie points are used to facilitate measurement and binding of global coordinates. The issue that will be discussed is measuring the level of precision of the point clouds of the registration results tied to the framework net and auxiliary tie points. To test the level of precision of the binding point for 3D scanning using TLS, 3D scanning measurements of Labtek IX-C Geodesy and Geomatics building ITB floors 1,2 and 3 were measured with the details of the 1st floor tied to frame point nets, floors 2 and 3 tied to auxiliary tie points. The results of the 1st floor registration tied to the frame point nets have 14 mm RMSE, while on the 2nd and 3rd floors are tied to the auxiliary tie points having a 9 mm RMSE registration value. After the measurement results are registered each floor, the whole floor registration is carried out. The results of the entire floor registration indicate a 5 mm RMSE value. The RMSE value on the entire floor registration which is smaller than registration each floor proves that the auxiliary binding points can be used to tie the scanning results to the global coordinate system.