Digital Map Updates with UAV Photogrammetric Methods

Abstract

Currently, Korea's digital maps are being produced through traditional aerial photogrammetry methods. Aerial photogrammetry is the most economical way to produce a map of a wide area. However, timely survey is not allowed depends on weather condition and it is inefficient for small area surveying in economic point of view. Therefore, it costs too much and needs long time to produce a map for various small areas where are terrestrial changes for updating the map. In contrast, UAV photogrammetry is possible to work even in cloudy weather because of shooting at low altitude below the clouds. It also has excellent mobility and shoot quickly and well suited for small-scale mapping in several places by low cost. In this study, we produced an ortho-photo and digital map with the UAV photogrammetry method using SIFT and SfM algorithm and verified its accuracy to evaluate the applicability for future digital map updates. The accuracy was verified by comparing the results of the ground survey for check points selected on the digital map. Test results show small errors at ±2.6cm in X coordinates, ±2.8cm in Y coordinates and ±5.8cm in height and we could find a possibility that UAV photogrammetry would be fully applicable for digital map updating.

An Automatic and Accurate Method for Marking Ground Control Points in Unmanned Aerial Vehicle Photogrammetry

“…Furthermore, the environmental and lighting conditions of UAV surveys are more complex. Most cameras onboard UAVs are nonmetric or consumer-grade digital cameras, which exhibit much greater magnitudes of instability and distortion [54]. Therefore, the improved coded target PXCCT is proposed to address these challenges and achieve automatic and accurate GCP marking in UAV surveys.…”

Evaluating spatial resolution for quality assurance of UAV images

“…However, aerial photogrammetry is evaluated as a technology appropriate only for the periodic acquisition of high-resolution images targeting a wide area over a certain size, because of some problems with the operation of equipment, the time of photographing and economic feasibility [1,2].…”

Development of Pre-flight Simulator to Improve The 3D Modeling Efficiency using UAV

“…서 론 무인항공기(UAV; Unmanned Aerial Vehicle)는 사람이 탑승 하지 않고 원격 조종, 자동 비행, 반자동 비행, 자율 비행을 하는 비행체를 의미한다 [1]. 특히 공간정보 취득 분야에서는 유인기 를 이용한 공간정보 취득에 비해 시간과 비용 면에서 효율이 높 다 [2]. 따라서 공간정보 분야에 드론을 활용한 연구는 지속적으 로 수행되고 있다.…”

“…윤부열(2014) 은 구축된 공간정보를 활용하기 위한 방안으로 통합운영 방안 을 제시하였으며 [4], 김덕인(2014)은 무인항공기를 이용하여 광범위한 지역의 모니터링 적용을 위한 연구를 수행하였다 [5]. 임수봉(2015)은 무인항공사진측량을 이용하여 수치지도를 갱 신하는 방법을 제시하고 그 정확도를 분석하였으며 [2], 성상민 (2016)은 무인항공사진측량에서의 농경지 필지 경계설정 정확 도를 파악하였다 [6]. Ⅲ.…”