Mission Espada, one of five missions making up the San Antonio Mission UNESCO World Heritage Site, is comprised of numerous masonry walls in various conditions. The north gate and wall section began to lean and further excavation was needed to determine the foundation's condition. As part of this archaeological survey the foundations were documented using photogrammetry which was taken and used as the base for CAD drawings documenting the excavated stones.
Drawings were produced while working for the University of Texas Center for Cultural Sustainability for the National Park Service.