Part of the digital work supporting my dissertation research is a GIS mapping project featuring the fortresses, monasteries and churches that were occupied by military-religious orders in Medieval Iberia. I began this project by creating ADIMO, the Architectural Database of Iberian Military Orders. Orders in the database were then mapped according to their GIS coordinates in order to accomplish the viewshed analysis portion of the project. The best way to explain this technology is that it chooses an “avatar” location – in my case the top of a fortress – then asks every pixel on that terrain map if it can be seen by a person standing at the avatar location. The maps you see here were taken from a talk I gave at the International Congress of Medieval Studies in Kalamazoo, MI in 2012.