| The advance of researches for the study of protohistorical engravings (drawings and database) in the mont Bego region, and the development of geographical analysis tools (GPS, GIS) allow to relate engraved rocks with their geographic context. This approach, if not totally new, is at least original given the corpus to work with: 20 000 figurative engravings and 4 200 engraved rocks. After their integration into a database link with a GIS, the spatial projection of data shows different groups of engravings. It stays to introduce in the analysis the chronologic criterion to distinguish between evolutions of graphical systems (diachronic) from the symbolical structuring of the site (synchronic). These results would probably found comparisons with the evolution of symbolic systems during later Neolithic in occidental Mediterranean. |