International audienceThe development of complex spatial-referencing (geomatic) tools gives rise in archaeology to information systems which result from the specific products of spatial information, data structures, thematic analyses, and particular scales and methods of analysis. In effect, the systems of GIS allow processing of the archaeological information, organised on the basis of the nature of the spatial data, at several scales (an excavation, town, micro-region, region etc.). The functions available to these tools allow new methods of data exploitation and give birth to multiple thematic maps.The acquisition of the spatial data is facilitated by the linkage of GIS to specific geo-referencing tools (e.g. GPS), or to topography. GIS ...