Modern archaeologists often find it difficult to identify the exact position on the field (and on the maps) of the findings brought in light in the archaeological excavations carried out particularly before the half of the 20^th century. In these cases, in fact, they are obliged to record data and information on their GIS being unable to locate the correct place, or even the area, of that ancient archaeological investigations. This inability to be carefully precise creates several problems from the topographical point of view and strongly influences the archaeological reconstruction of specific territories or sites.

Therefore, how is it possible to correctly locate and, as a result, mark on the map what was discovered or excavated in the recent past? One possible solution is the 3D reconstruction of a modern landscape through the use of the drone and some derived applications, such as digital techniques based on Structure from Motion and Imaged-Based methodologies. The 3D model can be analyzed using the GIS system, and through the analysis of the micro-relief and aerial photos it is possible to use an important tool to locate past archaeological researches.

In the following contribution we would present case the study of Mount Siri (Anzi, Basilicata), place of several and important archaeological discoveries in the 19^th century.