Obstacles: Camerasmounted on the UAV recorded any in object in its
field-of-view. Eventually larger volumes due to inclusion of temporary
objects – for example pieces of equipment, temporary support
structures, interlace storage or cut/fill locations, or a trench – might
need to be removed/added manually as they should not count towards
the final earthwork volume count. Such adjustment – as needed
on a few occasions in the conducted experiment – was done
manually and is already accounted for in the time calculation of
Table 3. The results though did not change significantly.