# UAV를 이용한 소하천 지형자료 구축에 관한 효율성 제고

• Accepted : 2016.03.28
• Published : 2016.03.31
• 21 85

#### Abstract

Due to the recent technical development and the enhancement of image resolution, Unmanned Airborne Vehicles(UAVs) have been used for various fields. A low altitude UAV system takes advantage of taking riverbed imagery at small rivers as well as land surface imagery on the ground. The bathymetric data are generated from the low altitude UAV system. The accuracy of the data is analyzed along water depths, comparing GPS observations and a DSM generated from UAV images. It is found that the depth accuracy of the geospatial data below 50 cm depth of water satisfies the regulation(${\pm}10cm$ spatial accuracy) of bathymetric surveying. Therefore this research shows that the geospatial data generated from UAV images at shallow regions of rivers can be used for bathymetric surveying.

#### Keywords

Hydrographic Survey;Bathymetric;UAV;Accuracy;Digital Surface Model

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