The first white light scan of a Neolithic Site in Cornwall
In the summer an experiment took place to obtain digital 3D images of each of the quoit’s principal stones with a white light scanner. The aim is to capture detailed information on the surface areas and curvatures of each stone as well as data on density and central gravity. These images will be modelled and help us with the restoration of the entire monument next year.
This will enhance interpretation and presentation through the provision of 3D mesh digital modelling which can be used in apps, visualisation and 3D graphic images. These images can also be animated and uploaded onto an app.
In order to capture all the information required all the stones, including the capstone (Stone 1), had to be scanned and then turned over so that their undersides could also be scanned. Three shallow dimples can be seen in this surface in places where the three uprights touched the stone. The rough side of the underside of the capstone has a high density of quartz within the granite. It is generally very uneven and in certain light it is possible to see small cup-like hollows.
In recent years high resolution 3D digital modelling using laser scanning supplemented by photogrammetry has made considerable advances in the systematic studies of upstanding monuments – not the least, prehistoric megaliths (cf Stonehenge, British Archaeology Nov/Dec 2012). Laser scanning the Carwynnen Quoit stones has the potential to enhance their study and contribute new knowledge about these ancient monuments. Results of the laser scan will be analysed and presented as a series of graphic outputs – one of which will be for use as a CAD drawing.