UAV based very-high-resolution imaging on Barton Peninsula Antarctica.

UAV (unmanned aerial vehicle) capable of shooting in low-altitude with an advantage of taking a high-resolution is economical and accessible way of obtaining images compared to satellite and conventional aerial photography. In this study, UAV imaging was performed to obtain very-high-resolution images in restrictive environment of Antarctic in Jan 2014. The target area was nearby the King Sejong station located in Barton Peninsula, Antarctica. The UAV was equipped with GPS/INS and IMU, and Canon EOS 5D Mark III camera. Flights considering unexpected weather condition of Antarctica were planned with combination of 22 courses, flight altitude of 100 m, forward overlap of 70% and lateral overlap of 30%. As flight results, about 1,500 images of spatial resolution of about 2 cm were obtained with location and attitude information. In preprocessing steps, brightness adjustment and geometric correction were performed to produce orthoimages. Mosaicked orthoimages was produced with an extent of about 3.1 km2 around the King Sejong station. Quality of the mosaicked image was evaluated by overlapping 1/5,000 digital topographic map and KOMPSAT-2 satellite images of 1 m spatial resolution.无人飞行器（unmanned aerial vehicle，UAV）可执行低空拍摄任务，相较于卫星及传统航空摄影，其在获取高分辨率影像方面兼具经济性与可及性。本研究于2014年1月在南极严苛环境下开展无人机航摄作业，以获取超高分辨率影像。拍摄目标区域位于南极巴顿半岛的世宗科学基地（King Sejong Station）周边。本次使用的无人机搭载了GPS/INS组合导航系统与惯性测量单元（Inertial Measurement Unit，IMU），以及佳能EOS 5D Mark III相机。考虑到南极多变的突发天气状况，本次航飞任务规划了22条航线，设定飞行高度为100米，航向重叠度70%，旁向重叠度30%。本次航飞共获取约1500幅空间分辨率约2厘米的影像，且每幅影像均附带位置与姿态信息。在预处理阶段，研究人员通过亮度调整与几何校正生成了正射影像（orthoimages）。随后以世宗科学基地周边区域为范围，拼接生成了覆盖面积约3.1平方千米的正射影像镶嵌图。通过与1:5000数字地形图以及空间分辨率1米的KOMPSAT-2卫星影像进行叠加比对，对该镶嵌影像的质量开展了评估。