Integrated use of DGPS and Total Station for the survey of archeological sites: the case of Colle Breccioso (Borgorose, RI)

A series of topographical surveys carried out during the past years in the Salto Valley (Rieti - Lazio), have provided much interesting data regarding local archaeological sites, particularly along the southern slopes of the Breccioso Hills which rise between the Corvaro and Spedino plain. An interesting site has recently come to our attention at Colle Breccioso. However, the nature of the site was not clear and its structure is hazy, a consequence of the deterioration of the surrounding ground and increased vegetation coverage. The situation at the site suggested that a detailed survey of the southern incline and the plateau associated with the site would be valuable. The objective of the survey was to highlight topographic variation and to bring to light any traces of human construction or manipulation. The survey was carried out using a DGPS Leica SR 510, and a total station. The integration of these two instruments (which had both, differing and complementary capacities) produced satisfactory and innovative results. The processing of the Digital Terrain Model (DTM) of the area highlighted several characteristics of the site and the consequent production of thematic maps from this data could be used to guide future excavations at the site.