Accuracy Standard. In performing right of way surveys consisting of boundary locations, Developer shall meet the accuracy standards of the appropriate level of survey as defined in the following table. CHART OF TOLERANCES URBAN / RURAL URBAN BUSINESS DISTRICT REMARKS AND FORMULAE Error of Closure 1:10,000 1:15,000 Loop or between Control Monuments Angular Closure 15" √N 10" √N N = Number of Angles in Traverse Accuracy of Bearing in Relation to Source * 20 sec. 15 sec. Sin α = denominator in error of closure divided into 1 (approx.) Linear Distance Accuracy 0.1 foot per 1,000 feet 0.05 foot per 1,000 feet Sin α x 1000 (approx.) where ± = Accuracy of Bearing Positional Error of any Monument AC/10,000 AC/15,000 AC = length of any course in traverse Adjusted 1:50,000 1:50,000 Mathematical Closure of Survey (No Less Than) * TxDOT policy requires all bearings or angles be based on the following source: Grid bearing of the Texas Coordinate System of 1983, with the proper zone and epoch specified.
Accuracy Standard. Precision of the Deliverables shall be based on the Positional Accuracy Concept. The Contractor shall recommend positional accuracy limits and error of closure limits for the areas, terrains and properties being studied or surveyed as part of the Study.
