Description: Network of 72 monuments at approximately six kilometer spacing. It is a densification of the Wisconsin Department of Transportation (WDOT) High Accuracy Reference Network (HARN). Survey work, and adjustments were performed by Aero-Metric Engineering in 1992. Because the Sheboygan County project predated the development of the WDOT prototype RFP, the accuracy of the work exceeded the standard used by WDOT for projects undertaken since that time. All Sheboygan County map layers, including section corners, are referenced to this control network.