Public Land Survey System (PLSS) control that have established survey grade GPS coordinates.Wisconsin County Surveyor's Association survey grade standard:Coordinates collected under the direction of a Professional Land Surveyor, in a coordinate system allowed by s. 236.18(2), and obtained by means, methods and equipment capable of repeatable 2 centimeter or better precision.Statutory Standards for PLSS Corner Remonumentation:s. 59.74, Wis. Stats. Perpetuation of section corners, landmarks.s. 60.84, Wis. Stats. Monuments.ch. A-E 7.08, Wis. Admin. Code, U.S. public land survey monument record.ch. A-E 7.06, Wis. Admin. Code, Measurements.s. 236.15, Wis. Stats. Surveying requirements.