Conventional Method (Horizontal & Vertical Clause Samples

Conventional Method (Horizontal & Vertical. If Developer chooses to use conventional methods to establish additional horizontal control, Developer shall meet the accuracy of the appropriate level of survey as defined in the following tables. Horizontal control is to be established (at a minimum) on the Texas State Plane Coordinate System NAD 83. Vertical control shall be established (at a minimum) on the North American Vertical Datum of 1988 (NAVD 1988). Level 3 Level 4 Remarks and Formulae Error of Closure 1: 50,000 1:20,000 Loop or between monuments Allowable Angular Closure ± 3” √N ± 8” √N N= number of angles in traverse Accuracy of Bearing in Relation to Course * ± 04” ± 10” Maximum for any course Linear Distance Accuracy (Minimum Length of Line) 1: 50,000 (2,500 feet) 1: 20,000 (1,000 feet) Positional Tolerance of Any Monument AC/ 50,000 AC/20,000 AC = length of any course in traverse Adjusted Mathematical Closure of Survey (No Less Than) 1: 200,000 1: 200,000