Low-altitude UAiCs flight planning design of meandering channel at small catchment

The emergence of spatial data updating can be acquired from Unmanned Aerial Imagery Capturing System (UAiCs) photogrammetry that is low cost but could represent data at large scale. This can be achieved with a proper UAiCs flight planning which include pre-preparation or site investigation particularly in knowing the characteristic of the topography and meteorological condition of the area to be surveyed. Nowadays flight planning can be designed easily in the computer and in this study Mission Planner software was used. The study area emphasize on the flood prone area which surrounded by meandering river and canal. The ability of the UAiCs to fly at low altitude will give an advantage to produce better ground resolution up to centimetre level which hope can discriminate the higher and lower ground for the betterment of flood simulation and analysis. The result from the flight path analysis shows that for the 100 m, 200 m and 300 m flying altitude, the ground resolution increase from ±3 cm to ±10 cm but the flight time reduce from around 2 hours to less than 1 hour.