In year 2008, the A88 motorway construction gave the opportunity to rediscover and excavate two hectares of flint extraction pits.
Just under the topsoil, the pits are not very deep, but they open into radiating galleries.
We were asked to carry out a 3D survey of the pits, using 3D laser scanning technology.
To provide a workable map of the surface, I produced this orthophotography, in which a section of the basement has been overlaid.
click to enlarge