This session will cover a brief history of the State Plane Coordinate Systems along with various realizations of NAD 83 and legacy NAD 27. Additionally the vertical interfaces with both NGVD 29 and NAVD 88 and its corresponding Geoid Models will be touched on. Various methodology for ""Scaling"" State Plane Coordinates to a modified ground system will be discussed. GNSS Site Calibration and localization theories will be considered along with a series of best practice routines, quality control and calibration troubleshooting.