By an aerial survey, we refer to a process of collating data from an airborne craft. The purpose of a survey is to record an “as is” state or to better understand a specific subject. All of our aerial surveys are currently carried out with a drone. Drones are small and efficient and can easily access many places.
Collected data can take many forms – it really depends upon which sensors are added to the craft. Cameras, which are essentially visual sensors, capture photos or film. They also record data about the capture itself. Focal length, aperture and speed of exposure are just a few of those. Thermal imaging sensors record thermal signature of objects and living things. GPS records the position of the craft. And so on. You get the picture, right?
However, the survey does not quite end there. Gathering data, or data acquisition as we call it, is only one part of it. After the data has been collected, it needs to be processed and converted into a desired format. This could take form of a 3D topography mesh, a land survey drawing, an orthomosaic photo, and so on.
Common examples of drone survey include land surveys, visual inspections and thermal inspection surveys.
The video below, shows a 3D mesh generated from one of our aerial surveys. It was developed from around 900 geo-tagged images captured from air. The survey allowed an engineer to develop his structural concepts and provided invaluable information later during construction.