3차원 수치영상 지형지도의 제작에 관한 연구: 항공레이저측량자료, 항공사진, 대축척 수치지도를 활용하여

Abstract

The development of the digital mapping techniques, computing devices and internet services has fostered a growing interest in 3D digital mapping of the terrain. Especially, a 3D digital image map can be helpful in that it offers the reality and solidity of the terrain. In this paper, a step-by-step algorithm was presented to create a 3D digital image map using ALS data, aerial photos and 2D digital maps. First, discrepancies in ALS data strips were detected and adjusted. Second, to represent ALS data, aerial photos and 2D digital maps in a common reference frame, they were co-registered using linear features. Then, with co-registered dataset, the ortho-photo was generated. Finally, the 3D digital image map was created by overlapping the ortho-photo, 2D digital maps and DEM generated from ALS data. The results clearly demonstrate that the proposed algorithm is effective in 3D digital image mapping of the terrain. Future research will focus on the automation of the proposed algorithm, including tasks such as extracting linear features from dataset and matching these features. In addition, it is important to represent 3D objects such as buildings, roads and etc, on the 3D digital image map.