Heritage/Complex Surveys using a combination of Terrestrial Scanning and Aerial

Undertaking surveys of Heritage Sites such as towers/castles/ruins can be challenging
due to the non-uniform nature of the structures. This means that it is not possible to
capture the data using traditional Total Station/Surveying Methods. The solution in
such cases is to use laser scanning to capture the structure with the output a point
cloud containing millions of points related to the required coordinate system.

The use of laser scanning for complex structures and surveys is now an established
form of surveying with most companies well equiped to deal with point clouds as part
of the design process.

At Bronra Surveys we combine Terrestrial Laser Scanning with Aerial Surveying
Techniques to gain information difficult to measure using Terrestrial Scanners.

Limitations with using only a Terrestrial Laser Scanner is the fact that a scanner can
only measure what it can see from its set up location. This means that if access to a
roof for example is not possible, for one reason or another, it is not possible to collect
the data. The use of a Drone to create a 3D point cloud compliments the laser scans
and fills in the data which the scanner may struggle to measure while also providing an
accurate 2D orthomosaic of the area which can be dropped into a traditional survey
already scaled and to grid coordinates giving real life context to the traditional survey
data captured. The use of the Drone cuts the time involved in surveying a structure
hugely as there is no need to set up in difficult locations (ie a roof).

The fact that both the Terrestrial and Aerial Point Clouds are both surveyed to grid
coordinates allows the 2 surveys to be easily combined to create one large point cloud.
The output point cloud can then be outputted and manipulated in various programs.