Japan Geoscience Union Meeting 2015

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Oral

Symbol H (Human Geosciences) » H-TT Technology & Techniques

[H-TT30] New horizons brought by UAV

Mon. May 25, 2015 4:15 PM - 6:00 PM 101A (1F)

Convener:*Akihiko Kondoh(Center for Environmental Remote Sensing, Chiba University), Hiroshi Inoue(National Research Institute for Earth Science and Disaster Prevention), Hitoshi Hasegawa(Dep.Geography Kokushikan Univ.), Osamu Saitou(Ibaraki University), Chair:Akihiko Kondoh(Center for Environmental Remote Sensing, Chiba University)

5:00 PM - 5:15 PM

[HTT30-03] Position measurement of ground control points and its accuracy with UAV photogrammetry

*Mikio TOBITA1, Takayuki NAKANO1, Izumi KAMIYA1, Kousei OTOI1, Junko IWAHASHI1, Hidetoshi NAKAJIMA1 (1.GSI of Japan)

Keywords:UAV, Ground Control Point, SfM, MVS, Drone

It is sometimes possible to measure surface position in the spatial density of a few cm by SfM (Structure from Motion) - MVS (Multi-view Stereo) techniques using photographs taken by UAV (Unmanned Aerial Vehicle) at low altitude. The higher the accuracy is, the more diverse the field will be in the fields of geoscience, geospace, and disaster prevention.
The accuracy of the estimated positions highly depends on the camera, camera model, quality of photos, flight altitude, overlap, position accuracy of the drone, analysis software, and conditions of the analysis.
We installed ground markers in the site of Geospatial Information Authority, Tsukuba and took nadir and oblique images with a multicopter. Comparisons of estimated positions varying some of the parameters will be reported.