ANALISIS PERBANDINGAN METODE GEOREFERENSI LANGSUNG DAN TIDAK LANGSUNG PADA DATA AWAN TITIK
(STUDI KASUS : GEDUNG PAU ITB)
Terrestrial Laser Scanning (TLS) technology can produce 3-Dimensional Modeling with good geometry. However, to be able to produce good geometric accuracy, one of which is the need for proper registration techniques and georeferencing processes. The registration technique that is widely used is the Iterative Closest Point (ICP) algorithm. The success of this registration technique is affected by the percentage of overlap, the magnitude of the angle, and the distance between the two data point clouds. In the indirect georeferencing technique, the point cloud data does not yet have global coordinates, so to unify all the scan results, the registration method using target-to-target registration or cloud-to-cloud registration needs to be done before using the ICP algorithm. Whereas in direct georeferencing, point cloud data for all scan results already has global coordinates so that the registration technique can directly use the ICP algorithm. How precise is the direct georeferencing method compared to the indirect georeferencing method on the results of the registration of the two point cloud data will be discussed in this study. The results obtained are the Root Mean Square Error (RMSE) value is the same for both direct georeferencing and indirect georeferencing methods.