For topographic survey, exterior building inspection, land subsidence detection, and slope stability monitoring, what we need is just a small drone (< 20 kg). During the drone operation, it is expected to generate some degrees of noise. But the noise pollution is generally much lower than noise produced by a typical construction work. Further, the duration of inspection is typically less than a hour.

For air quality and weather monitoring, we will install a small weather station (half the size of a typical street lamp) at a designated area. The installation work (including power cabling and system setup) will take less than a day. The sensing data will be sent to our cloud server through wireless link. No noise will be generated during the data acquisition and monitoring.