The document discusses using GIS and 3D modeling techniques to analyze spatial relationships and visibility within the Avebury prehistoric landscape. Specifically, it focuses on analyzing dynamic and static viewsheds along the hypothesized path of the Beckhampton Avenue. Technical details are provided on building a DEM from contour data, calculating viewsheds in GIS, reconstructing the landscape and archaeological features in 3D, and efforts to dynamically link the GIS and 3D model applications. The analysis of cumulative viewsheds along the avenue's path revealed areas that would have been particularly visible.