Digital Terrain Modelling
Also known as Digital Elevation Modelling, Digital Terrain Modelling (DTM) allows the visualisation of the surface of monuments and archaeological features. By accurately measuring the land surface using GPS or a total station, detail can be expressed as a digital image or as contours. We can enhance surveys using hachures and lines and polygons to highlight features of archaeological interest. The models can also be combined with geophysical data in order to provide an extra dimension to analysis.
A range of functions can be carried out on the data to enhance certain visual aspects of the model such as height exaggeration and lighting effects. The model of Castel Combe castle below was produced from data collected in dense woodland and the site can now be visualised as never before.
Digital Terrain Model of Castle Combe 12th century motte and bailey castle.
Survey data can be captured by total station or GPS/GNSS but can
also be supplied from existing surveys such as Environment Agency
LiDAR. The height data is also a byproduct of our cart-based
magnetometer system that works in conjunction with a Leica GS10 GNSS.