Questions:1.) If an EDM instrument has a stated accuracy of ±(5 mm + 5ppm), what error can beexpected in a measured distance of (a) 3.25 miles (b) 2000.00 feet? Express answersin mm.2.) Why must an atmospheric correction be applied to a distance measured with an EDMinstrument?3.) Calculate the horizontal distance between point A and B if a slope distance of3,562.15 feet is measured with an EDM instrument. The EDM is set up at point Aand has a height of 5.30 feet. The reflector is set up at point B and has a height of4.27 feet. The elevation of point A is equal to 752.60 and the elevation of point B isequal to 627.12.4.) If a temperature of 32°F and barometric pressure reading of 29.5 in. Hg is observed,determine the correctionactor for atmospheric conditions. Use the attached graph.5.) Points A, B and C form a fixed triangle in the field. A total station instrumentoccupies point C and is used to determine a distance of 1783.32 feet to point A (sideCA), and 301.62 feet to point B (side CB).determined to be 121°02'15", what is the distance of side AB?If the interior angle at point C is

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Answered: Questions: 1.) If an EDM instrument has…

Questions: 1.) If an EDM instrument has a stated accuracy of +(5 mm + 5ppm), what error can be expected in a measured distance of (a) 3.25 miles (b) 2000.00 feet? Express answers in mm.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter14: Highway Surveys And Location

Section: Chapter Questions

Problem 5P

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An angle was carefully measured 10 times with an optical theodolite by observers A and B on two separate days. The calculated results are as follows: Observer A Mean: 42°16'25" Probable Error: +3.2" Observer B Mean: 42°16'20 Probable Error: +1.6" Compute the most probable value of the angle.
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