Groundtruthing is a body of work created in Patterson’s studio located at St. Mary’s College of Maryland in Anne Arundel Hall. The studio was adjacent to Historic St. Mary’s City (the building has since been demolished). Patterson would regularly take visual research walks through Historic St. Mary's City. On the property are wooden structures commonly referred to as "ghost houses." These structures are scaffolds that represent the original colonial structures, but they are not complete. The landscape is part of what the viewer sees through the structure. Patterson regularly draws from the structures and incorporates the landscape that appears through it. The term Groundtruthing is a term used in remote sensing. It refers to information collected on location through image data collection. The data is used to analyze and interpret what is being sensed.