Global Multirotor UAV Market Assessment, By Rotor Count [Quadcopters, Hexacopters, Octocopters, Others], By Application [Aerial Imaging and Filming, Survey and Mapping, Agricultural Spraying, Others], By Payload Capacity [Lightweight (< 5 kg), Medium (5–20 kg), Heavy‑Lift (> 20 kg)], By Region, Opportunities and Forecast, 2018-2032F