ASSESSING THE ACCURACY OF DIGITAL ELEVATION MODEL GENERATED FROM UNMANNED AERIAL VEHICLE (UAV) IMAGERY : FOR THE COAST BEACH

Title
ASSESSING THE ACCURACY OF DIGITAL ELEVATION MODEL GENERATED FROM UNMANNED AERIAL VEHICLE (UAV) IMAGERY : FOR THE COAST BEACH
Author(s)
김범준; 유주형; 이윤경; 김계림; 신지선
KIOST Author(s)
Ryu, Joo Hyung(유주형)Kim, Kye Lim(김계림)Shin, Jisun(신지선)
Publication Year
2016-04-22
Abstract
The Unmanned Aerial Vehicle (UAV) technology is becoming useful to generate a Digital Elevation Model (DEM). Aerial triangulation is the basic method for analyzing UAV images in order to generate the DEM. The aerial triangulation method effectively calculates the 3-dimensional coordinates of object points of images. For more accurate results of DEM and ortho-rectified image, camera calibration is necessary. The DEM generated from this method needs to 3-dimensional (x, y, z) verification. The first purpose of this study is quantitative evaluation of the DEM by changing the number of Ground Control Point (GCP) measured by Real Time Kinematic-GPS (RTK-GPS). The second purpose is overlap (%) degree analysis of the images acquired from UAV. The study site is eastern coast beach of the Korean Peninsula. In this study, we used a rotary-wing UAV (width: 90 cm payload: 3 kg flight speed: 10 km/h flight height: 50-700 m flight duration: 15 min). The study site is covered by natural features such as sand, gravel and vegetation that do not provide defined points to be used as GCPs. In order to obtain accurate results of the DEM, several GCPs are needed. However, the optimum number of GCP has not been defined in detail. To get an effective number of GCP, DEMs with different number of GCP were compared. In addition, various overlap degree analysis of the images was performed from different flight paths. In order to evaluate thectively calculates the 3-dimensional coordinates of object points of images. For more accurate results of DEM and ortho-rectified image, camera calibration is necessary. The DEM generated from this method needs to 3-dimensional (x, y, z) verification. The first purpose of this study is quantitative evaluation of the DEM by changing the number of Ground Control Point (GCP) measured by Real Time Kinematic-GPS (RTK-GPS). The second purpose is overlap (%) degree analysis of the images acquired from UAV. The study site is eastern coast beach of the Korean Peninsula. In this study, we used a rotary-wing UAV (width: 90 cm payload: 3 kg flight speed: 10 km/h flight height: 50-700 m flight duration: 15 min). The study site is covered by natural features such as sand, gravel and vegetation that do not provide defined points to be used as GCPs. In order to obtain accurate results of the DEM, several GCPs are needed. However, the optimum number of GCP has not been defined in detail. To get an effective number of GCP, DEMs with different number of GCP were compared. In addition, various overlap degree analysis of the images was performed from different flight paths. In order to evaluate th
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/24862
Bibliographic Citation
International Symposium of Remote Sensing 2016, 2016
Publisher
Korean Journal of Remote Sensing
Type
Conference
Language
English
Publisher
Korean Journal of Remote Sensing
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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