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

Figure 16.

South View. A photograph simulating a similar view as figure 15 from the top of the fortress-monastery of Calatrava la Nueva. Notice the clear view of a pass to the south through the Sierra Morena mountains that led to Almohad-controlled Andalucía. (Photo by author, 2011).