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second benchmark. ❑ (b) Closure in feet must be accurate to a standard of plus or minus .05 ft. times the square root of the distance in miles. ❑ (c) All surveys and maps or reports with elevation data shall indicate the datum and a description of the benchmark(s) upon which the survey is based. ❑ (d) Minor elevation data may be obtained on an assumed datum provided the base elevation of the datum is obviously different than the established datum. (2) Horizontal Feature Accuracy: ❑ (a) Horizontal Control: All surveys and maps or reports expressing or displaying features in a publicly published coordinate system shall indicate the coordinate datum and a description of the control points upon which the survey is based. ❑ (b) Minor coordinate data may be obtained and used on an assumed datum provided the numerical basis of the datum is obviously different than a publicly published datum. ❑ (c) The accuracy of control survey data shall be verified by redundant measurements or traverse closures. All control measurements shall achieve the following closures: Commercial/High Risk Linear: 1 foot in 10,000 feet; Suburban: Linear: 1 foot in 7,500 feet; Rural: Linear: 1 foot in 5,000 feet; ❑ (d) When statistical procedures are used to calculate survey accuracies, the maximum acceptable positional tolerance, based on the 95% confidence level, should meet the same equivalent relative distance standards as set forth in 61G17- 6.003(3)(p)(2.)(c) F.A.C. ❑ (e) Intended Display Scale: All maps or reports of surveys produced and delivered with digital coordinate files must contain a statement to the effect of: "This map is intended to be displayed at a scale of 1/ or smaller". 61G17-6.004 Specific Survey, Map, and Report Requirements (1) As-Built/Record Survey: ❑ (a) Obtained field measurements of vertical or horizontal dimensions of constructed improvements so,that the constructed facility can be delineated in such a way that the location of the construction may be compared with the construction plans. ❑ (b) Clearly shows by symbols, notations, or delineations, those constructed improvements located by the survey. ❑ (c) All maps prepared shall meet applicable minimum technical standards. ❑ (d) Vertical and horizontal accuracy of the measurements made shall be such that it may be determined whether the improvements were constructed consistent with planned locations. (END OF SECTION) 01025-21 Technical Specifications F:\Public Works\ENGINEERING DIVISION PROJECTS\1621 IRC Courthouse Judges Security Upgrades\1-Admin\Bid Documents\Master Contract Documents\Technical Specifications.doc