Mo. Code Regs. tit. 20 § 2030-18.030
Current through Register Vol. 50, No. 1, January 2, 2025
Section 20 CSR 2030-18.030 - Accuracy of Horizontal ControlPURPOSE: This rule is being amended for clarity and to change reference from the Missouri Department of Natural Resources and the United States Coast and Geodetic Survey to the Missouri Department of Agriculture and the National Geodetic Survey or its successor organization.
(1) The accuracy of a horizontal control station is classified according to constrained and unconstrained, relative accuracy of the distance between stations, and the positional accuracy of the station relative to the stations held fixed in the adjustment. If the requirements for all three (3) criteria are not satisfied, the station shall fail to qualify for the classification.(2) First Order Horizontal Control. (A) The relative accuracy of the distance between directly connected adjacent stations shall be equal to or less than twelve millimeters (12 mm) for distances equal or less than one kilometer (1 km) and ten parts per million (10 ppm) for distances greater than one kilometer (1 km).(3) Second Order Horizontal Control. (A) The relative accuracy of the distance between directly connected adjacent stations shall be equal to or less than twenty-five millimeters (25 mm) for distances equal to or less than one kilometer (1 km) and twenty parts per million (20 ppm) for distances greater than one kilometer (1 km).(4) To fully qualify as a first or second order control station, the station must be accepted and published by the Missouri Department of Agriculture or the National Geodetic Survey or its successor organization. AUTHORITY: section 327.041, RSMo Supp. 1993.* This rule originally filed as 4 CSR 30-18.030. Original rule filed May 3, 1994, effective Dec. 30, 1994. Moved to 20 CSR 2030-18.030, effective Aug. 28, 2006. Amended by Missouri Register May 1, 2017/Volume 42, Number 09, effective 6/30/2017*Original authority: 327.041, RSMo 1969, amended 1981, 1986, 1989, 1993, 1995, 1999.