> Also, indoor flying means no GPS. Correct. However, indoor positioning tech will likely come of age in the next 12-18 months driven by indoor mapping and na

> Also, indoor flying means no GPS. Correct. However, indoor positioning tech will likely come of age in the next 12-18 months driven by indoor mapping and navigation. Once that becomes commoditized, it'll make positioning a little aircraft like this in the x,y plane of a floorplan doable without dead-reckoning. From there, you could probably do some crude lidar to measure the distances above/below the craft to the ceiling/floor.