Departmental Bulletin Paper 〈技術報告〉UAVによる空中写真測量技術を用いた河床形状測量における精度検証 : 東河内沢本川における事例
<Technical Report> Measurement Accuracy Verification of UAV-SfM Technique for River Bed Forms in a Mountain River Basin:

上治, 雄介  ,  山川, 陽祐

(5)  , pp.9 - 19 , 2017-03-31 , Agricultural and Forestry Research Center, University of Tsukuba , 筑波大学農林技術センター
Accuracy of Digital Surface Model (DSM) with orthochromatic image for river bed forms in a mountain river basin by using Structure from Motion (SfM) technique based on photographs taken from Unmanned Aerial Vehicle (UAV) was verified by comparing with topographic survey using GNSS (Global Navigation Satellite System) and laser range finder. The Root Mean Squared Error (RMSE) values taking the difference between Ground Control Points (GCPs) measured using GNSS and DSM were found as 0.036 m in latitude direction, 0.039 m in longitude direction, and 0.045 m in elevation: 0.007 m in oblique distance. The RMSE values taking the difference between surveying points measured using laser range finder and DSM were found as 0.03 m in latitude direction, 0.05 m in longitude direction, and 0.06 m in elevation: 0.09 m in oblique distance. These results with same surveying accuracy as in previous studies in plain areas indicated that the UAV-SfM technique is effective for measuring river bed forms in a mountain river basin.

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