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Advantages of aerial survey
example ortho

Using SUAs to carry out surveys has a number of advantages compared to ground survey. Utilising remote data capturing, SUAs greatly reduce the need for access to a site; indeed for some projects where height detail is not required there may be no need to set foot on site at all. This has the potential to significantly reduce the health and safety risks associated with ground survey.

Another benefit is the speed of data capture. Using our fixed wing aircraft we are able to survey up to 70 ha in a single 20 minute flight. Our battery capacity allows for up to 45 minutes flight time, affording plenty of battery redundancy and enabling the possibility of roving operations. This is ideally suited for active sites, where a snapshot in time is required.

The range of outputs available from an aerial survey is also far greater than those offered by ground survey. Raw photography, orthomosaics, 3d models and point clouds can all be produced from the same set of photographs.

Below is a table giving a rough guide to flight times for different sizes of site. The ground sample distance (GSD) referenced is the effective ground size of each pixel in the photograph.

flying time* for given area surveyed
ground separation distance (GSD)2.4cm8 mins18 mins45 mins
3.2cm8 mins15 mins35 mins
5cm6 mins12 mins25 mins

*times stated relate to a high accuracy requirement on a square site.

“Conventional laser scanning is often unable to record details to roofs or other inaccessible areas. An SUA can provide invaluable additional information to merge into the scanning data.”

Advantages of SUAs

• fast and efficient data capture • range of deliverables
• dense point coverage • remote sensing • reduced health and safety risks