Hail Event on 2022-06-28 in Locarno-Monti (TI), Switzerland: Drone Photogrammetry Imagery, Mask R-CNN Model and Analysis Data of Hailstones

This hail data collection belongs to a drone hail survey performed on 2022-06-28 in Locarno-Monti (TI, Switzerland). The supercell reached the location around 07:50 UTC in the morning. Only one photogrammetry flight could be performed and thus no estimation of the hail melting process is available. The orthophoto is masked to ignore parts where detection of hail is unwanted. Expert 1 (lai, mlainer), Expert 2 (jtm), Expert 3 (por, jportmann)本冰雹数据集源自2022年6月28日在瑞士提契诺州洛迦诺-蒙蒂（Locarno-Monti, TI, Switzerland）实施的无人机冰雹勘测任务。该超级单体雷暴于当日上午约07:50 UTC抵达作业区域。本次任务仅完成1次摄影测量飞行，因此无法开展冰雹融化过程的估算工作。正射影像（orthophoto）已完成掩膜处理，以屏蔽无需进行冰雹检测的区域。 参与标注的专家包括：专家1（lai、mlainer）、专家2（jtm）、专家3（por、jportmann）