We are currently surveying 120 acres for Dr. Joe Black (of Black and Benton Pediatricians). The property abuts the Knox/Anderson County line. Deeds are sketchy with vague descriptions perpetuated over decades. My preliminary approach is to use a geo-referenced USGS Quad sheet to develop coordinates to which I can navigate using hand-held GPS. That approach was moderately successful, yielding the property corners pictured below. It is a good start.