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A Method of DTM Generation from KOMPSAT-3A Stereo Images using Low-resolution Terrain Data

저해상도 지형 자료를 활용한 KOMPSAT-3A 스테레오 영상 기반의 DTM 생성 방법

Ahn, Heeran;Kim, Taejung
안희란;김태정

  • Received : 2019.10.15
  • Accepted : 2019.10.24
  • Published : 2019.10.31

Abstract

With the increasing prevalence of high-resolution satellite images, the need for technology to generate accurate 3D information from the satellite images is emphasized. In order to create a digital terrain model (DTM) that is widely used in applications such as change detection and object extraction, it is necessary to extract trees, buildings, etc. that exist in the digital surface model (DSM) and estimate the height of the ground. This paper presents a method for automatically generating DTM from DSM extracted from KOMPSAT-3A stereo images. The technique was developed to detect the non-ground area and estimate the height value of the ground by using the previously constructed low-resolution topographic data. The average vertical accuracy of DTMs generated in the four experimental sites with various topographical characteristics, such as mountainous terrain, densely built area, flat topography, and complex terrain was about 5.8 meters. The proposed technique would be useful to produce high-quality DTMs that represent precise features of the bare-earth's surface.

Keywords

KOMPSAT-3A;DTM;DSM;Conditional Dilation

Acknowledgement

Grant : 국토위성정보 수집 및 활용기술개발

Supported by : 국토교통부