3D Reconstruction of the Roman Site Aquis Querquennis by Means of TLS and GPR Methods

This chapter presents the 3D reconstruction of the Roman site Aquis Querquennis. Both terrestrial laser scanning (TLS) and 3D ground-penetrating radar (GPR) data acquisitions were carried out to provide high resolution images and 3D visualisation. The Faro Focus^3D X330 has shown its capabilities for measuring the 3D geometry of the overall settlement, letting users obtain, for example, the lengths, heights and volumes of every building or the width of a particular stone pillar, without making direct contact with them. The hybrid outcomes derived from both methods can be merged into a single image, allowing for the reconstruction of the visible reality of the archaeological site while integrating the unexcavated structures detected in the subsurface. The chapter focuses on the geometrical coregistration of orthoimages from different sensors under the same coordinate system. Data integration is performed through the fusion of colour LiDAR and radar imagery obtained over the same area by means of specific ground control points (GCP) placed on-site.