A Horizontal Control Survey establishes and depicts points on a horizontal coordinate system, such as latitude and longitude and state, municipal, or arbitrary coordinates. The horizontal control net shall comply with one of the Classes of Horizontal Accuracy defined in Section 20-300b-11 of these regulations.
A Vertical Control Survey establishes and depicts bench marks in relation to an appropriate vertical datum. Vertical measurements shall comply with one of the Classes of Vertical Accuracy defined in Section 20-300b-11 of these regulations.
Conn. Agencies Regs. § 20-300b-3