Drone and GPS Sensors-Based Grassland Management Using Deep-Learning Image Segmentation. - Satoki Tsuichihara; Shingo Akita; Reiichirou Ike; Masahiro Shigeta; Hiroshi Takemura; Takahiro Natori; Naoyuki Aikawa; Kazumasa Shindo; Yasuyuki Ide; Shigeki Tejima (IRC, 2019)