Abstract : This work consists mostly in a geographic and statistical approach concerning central tendencies (distributions, means, standard deviations, etc.) of some 20 000 pecked figurative engravings of mount Bego's region (Alpes-Maritimes, France). For the first time, combined use of GIS and statistical analysis (factorial analysis, multiple comparison tests, etc.) is employed in order to relate geographic proximities with iconographic similarities between engraved rocks and engravings. Classifications are automated; effects of seriation and partition are highlighted. The use of statistical tests (Dunn's test, etc.) allows giving a precise sense of what is " significant ", a term sometimes applied abusively to comment engravings distribution. Thus, interpretations are relegated to the congruent part of analysis. Concurrently with geostatistical analysis, an inventory and a revision of superimpositions of engravings is realized. The study of superimpositions indicates that weapons engravings (daggers and halberds) are among the most recent. On the contrary, fringed figures (anthropomorphic) seem to be within the most ancient ones. The reassessment of the archaeological finds enables identifying precise periods of occupation of the site, stressing the abundance of elements referring to the recent phase of Chassey Culture and late Bell Beakers culture. Despite a part of weapons engravings are related to late Bell Beakers and Early Bronze age transition, a part of them could be related to earlier stages.