Traffic and Highway Engineering
Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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USE OF STADIA REDUCTION TABLES. From an instrument station a
backsight, was made on a turning point and the following data were
obtained:
9.
upper stadia hair reading = 1.745m
rod reading = 1.495m
lower stadia hair reading = 1.245m
stadia constant = 0.381m
stadia interval factor = 95.5
observed vertical angle = -14°34'
height of instrument aboye occupied station = 1.495m
elevation of turning point = 463.24m
Determine the elevation of the instrument station using values taken from
stadia reduction tables.
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Transcribed Image Text:USE OF STADIA REDUCTION TABLES. From an instrument station a backsight, was made on a turning point and the following data were obtained: 9. upper stadia hair reading = 1.745m rod reading = 1.495m lower stadia hair reading = 1.245m stadia constant = 0.381m stadia interval factor = 95.5 observed vertical angle = -14°34' height of instrument aboye occupied station = 1.495m elevation of turning point = 463.24m Determine the elevation of the instrument station using values taken from stadia reduction tables.
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