PURPOSE: This rule sets forth the accuracy standards for all property boundary surveys.

1. (1) The professional land surveyor shall make an effort to detect and remove systematic errors.

2. (2) Precision Requirements for Urban Property.

   1. (A) The uncertainty due to random errors of any dimension of direction or distance shown on the plat shall not exceed fifty parts per million (50ppm) or one tenth of a foot (0.10') for distances less than two thousand feet (2,000') at the sixty-eight percent (68%) confidence level (one (1) sigma); and
   2. (B) The positional uncertainty of any coordinates shown on the plat relative to the control that is held fixed, shall not exceed fifty parts per million (50ppm) or one tenth of a foot (0.10') for distances less than two thousand feet (2,000') at the sixty-eight percent (68%) confidence level (one (1) sigma).

3. (3) Precision Requirements for Rural Property.

   1. (A) The uncertainty due to random errors of any dimension of direction or distance shown on the plat shall not exceed one hundred parts per million (100ppm) or one tenth of a foot (0.10') for distances less than one thousand feet (1,000') at the sixty-eight percent (68%) confidence level (one (1) sigma); and
   2. (B) The positional uncertainty of any coordinates shown on the plat relative to the control that is held fixed, shall not exceed one hundred parts per million (100ppm) or one tenth of a foot (0.10') for distances less than one thousand feet (1,000') at the sixty-eight percent (68%) confidence level (one (1) sigma).

AUTHORITY: sections 60.510(7), 60.550, and 448.2-109, RSMo 2016.* Material in this rule was originally covered in 10 CSR 30- 2.040. Original rule filed Dec. 1, 2016, effective June 30, 2017. *Original authority: 60.510, RSMo 1969, amended 2012, 2013; 60.550, RSMo 1969, amended 2013; and 448.2-109, RSMo 1983, amended 1988.