Abstract
The application of modern visualization techniques (e.g., isosurface rendering) has been beneficial for the 3D presentation of ground penetrating radar (GPR) datasets, compared to the conventional time-slice imaging method, in order to facilitate GPR data interpretation. In this case study, we concentrate on how to apply isosurface rendering technique to easily interpret and highlight the spatial variations within GPR data in archaeological applications. Isosurface renders are generated from surfaces with equal amplitudes, which are illuminated in the 3D data volume using artificial light that reflects off the surface, where the surfaces appear as 3D shaded images. In this paper, GPR data were acquired with a GSSI SIR2000 system using a 200 MHz shielded antenna and 0.5 m inline spacing in both x- and y-directions at Al-Nadura Temple archaeological site. The main objective of this case study was to image subsurface archaeological structures and potentially characterize cut-off ancient burial tombs inside ferrous sandstone situated at Al-Nadura temple, which date back to the Romans periods in Egypt. According to this case study, we highlighted the importance of isosurface rendering technique analyses towards more intensive GPR data interpretation and target identification. Moreover, by comparing extracted isosurface data with conventional presented time-slice, we demonstrate the radar important interpretability of the advanced visualization methods for precisely characterizing subsurface archaeological structures.