earticle

영어

This study aims to examine the accuracy of scanning using LiDAR, a representative technology in reverse engineering of existing buildings, which has recently received significant attention. Fixed ground LiDAR, commonly employed in architectural reverse engineering, inevitably incurs errors during scanning and subsequent alignment process from multiple locations. Additionally, the likelihood of errors increases depending on on-site conditions and the characteristics of the space being scanned. This research conducted actual scanning and measurements of three buildings within the Cheongsu-jang complex, representing the memory of Dogo Hot Springs in the Dogo Urban Regeneration Area. After creating drawings using the results measured in different ways, the study evaluated the length errors of major walls in the generated drawings. The errors were assessed using two primary indicators: absolute error, measuring the difference in absolute length, and error rate, gauging the relative ratio. The findings revealed that the absolute error length across the three buildings averaged between 82.74~184.5 mm, with an average error rate of 2.04~2.83%. Predominant errors occurred in rooms with long walls, complex shapes, or challenging site conditions, and in scenarios where establishing measurement standards like wall or window thickness was difficult. These errors can be attributed to mechanical, alignment, and on-site operational inaccuracies. Considering these points, further research is necessary to develop more accurate scanning guidelines and to validate accuracy in a wider variety of cases.