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2025 Vol.41, Issue 6 Preview Page
DEM Generation from CubeSat Imagery via Photogrammetry

CubeSat 위성 영상 활용한 Digital Elevation Model(DEM) 생성

Sang-Hyun Park1
,
Jun-Woo Shin2
,
Kyungwon Park3
,
Boo Hyun Nam4*
박 상현1
,
신 준우2
,
박 경원3
,
남 부현4*
1Graduate Student, Dept. of Civil Engineering, Kyunghee Univ.
2Member, Graduate Student, Dept. of Civil Engineering, Kumoh National Institute of Technology
3Graduate Student, Dept. of Civil Engineering, Kyunghee Univ.
4Member, Prof., Dept. of Civil Engineering, Kyunghee Univ.
1비회원, 경희대학교 사회기반시스템공학과 석사과정
2정회원, 금오공과대학교 토목공학과 박사과정
3비회원, 경희대학교 사회기반시스템공학과 박사과정
4정회원, 경희대학교 사회기반시스템공학과 교수
*Corresponding Author
31 December 2025. pp. 205-212
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Abstract

High-resolution digital elevation models (DEMs) are essential for hazard assessment and monitoring, but conventional methods such as aerial LiDAR or commercial satellites can be costly and slow. This study generates and evaluates a high-resolution DEM from a single PlanetScope stereo pair to offer a rapid, low-cost alternative. Using photogrammetric processing, a 4-m DEM was produced for Seoraksan National Park and compared with lower-resolution DEMs (SRTM 30 m, NGII 90 m). The CubeSat-derived DEM captured detailed valleys and ridges omitted in low-resolution models. Results demonstrate that a single CubeSat stereo pair can produce 3D terrain information suitable for rapid, economical updating and monitoring of complex mountainous terrain, for use in landslide and flood response.

Keywords
CubeSat
Digital elevation model
Photogrammetry
PlanetScope
Stereo imagery

고해상도 수치표고모델(Digital Elevation Model, DEM)은 재난 대응 및 지형 변화 탐지에 필수적이나, 기존 항공 LiDAR나 상용 위성은 높은 비용과 시간 제약으로 신속한 데이터 확보에 한계가 있다. 본 연구는 이러한 한계를 극복하고자, 저비용·고빈도로 전 지구를 촬영하는 초소형 위성(CubeSat) PlanetScope의 단일 스테레오 영상을 활용하여 고해상도 DEM을 생성 및 평가하는 것을 목적으로 한다. 이를 위해 설악산 국립공원을 대상으로, 적합한 스테레오 영상 쌍에 사진측량(Photogrammetry) 기법을 적용하여 4m DEM을 생성하였다. 생성된 DEM을 기존 저해상도 DEM(SRTM 30m, NGII 90m) 및 원본 영상과 비교한 결과, 본 연구에서 생성된 DEM이 저해상도 DEM에서 생략된 계곡과 능선을 명확히 묘사함을 확인하였다. 본 연구 결과는 CubeSat 단일 스테레오 영상만으로도 복잡한 산악 지형의 3D 정보 생성이 가능함을 입증하였으며, 향후 CubeSat을 통한 신속하고 경제적인 지형 데이터 갱신 및 산사태·홍수 등 재난 지역 모니터링에 효과적으로 활용될 수 있을 것이다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 41
  • No :6
  • Pages :205-212
  • Received Date : 2025-11-18
  • Revised Date : 2025-12-17
  • Accepted Date : 2025-12-18
  • DOI :https://doi.org/10.7843/kgs.2025.41.6.205
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