The document discusses using ground-penetrating radar (GPR) and integrating geophysical methods to study the Imperial Port of Rome. GPR was used to image subsurface features at the site from 2009 to present. Integrating multiple geophysical techniques, such as magnetometry, resistivity, and GPR, through graphical overlays and cluster analysis can provide more comprehensive subsurface information than a single method alone. However, challenges remain in applying these integration methods in 3 dimensions and using GPR at complex sites with issues of scale, resolution, topography, and accessibility.