Mapping Spheres of Influence on Medieval Iberia's Religious Frontier via Viewshed Analysis and Cost-Distance Analysis

Figure 3.

Cost-distance polygons and intervisibility and accessibility lines in northern Andalucía from the perspective of occupants at fortresses and towns with differing Christian and Muslim affiliations. Roman Roads data from: Digital Atlas of Roman and Medieval Civilizations (DARMC) https://darmc.harvard.edu