In other words, the location or coordinates of any point in the GIS must be accompanied by an accuracy measure. All other accuracy information such as linear distance and aerial accuracies can be derived from the accuracies of individual points using statistical error propagation methods. The National Geodetic Survey maintains a computer data base of horizontal, vertical and gravimetric control. This data is available to the public in various computer readable formats at a cost of reproduction. Descriptive data, points described in terms of text and a sketch, along with positions and elevations, is available for each control point on a special data sheet.
Data is available by county and includes measured data plus information on recoveries.
Due to special discount policy for ordering large volume of information, one should consider ordering information for the entire state rather than for single sheets. The following is a listing of Geodetic Data available and an attempt to analyze what a user may find. NAD 27 State - A digital listing of horizontally determined coordinates is available. A listing is available in latitudes and longitudes or State Plane Coordinates. Descriptive data is only available on paper.