This paper deals with the application of Geographical Information Systems to landscape archaeological studies and, in particular, with researches that follow an archaeomorphological approach. The study outlines the analytical potential especially for studying ancient land divisions. The case study presented here, drawn from a Phd project, is specifically dealing with the contribution that such Systems can bring to the archaeomorphological study of a wide stretch of the alluvial plain extended to the south of the city of Padua, with the Venice Lagoon to the east and the Euganei Hills to the west (Fig. 1): in this area, the analysis of landscape features highlights the traces of ancient territorial structures organized by orthogonal axes. We think they could be recognised as land divisions carried out during Roman times.