A Drone Photographic and Photogrammetric Portrait of Offa's Dyke

This preliminary article applies drone photograph and photogrammetry visualisations to four significant sections of Offa's Dyke to provide fresh insights into specific features of the monument. Also demonstrated is the role of drones as a means to record the present state of features for future reference, and as a tool for the discovery of subtle features not previously recorded. The four case studies chosen for this article are part of a drone survey that covers an effectively continuous 16km ribbon of the Dyke plus the sections of Hergest Corner and Rushock Hill. Together with the complete set of Offa's Dyke drone photography undertaken, they establish a platform for future work.