Using Horizontal and Vertical Control Points

GrafNet supports horizontal and vertical control points in addition to full 3-D control. To utilize either option, you must have available 1-10 m accurate coordinates for the unknown axes (that is, Z for horizontal control and latitude and longitude for vertical control). These coordinates can be obtained from the single point solution or from an initial network adjustment run using just one 3-D control point. The latter method is normally used.