Exercise 15 |
Ex.15-1The following reciprocal levels were taken on two stations P and Q:
Determine the elevation of Q and the error due to refraction when the collimation error is 0.003m downward per 100m. Ex.15-2 In order to reduce the error in measurement of vertical angle a set of measurements are taken and find the average angle as 9° 02' 05? form a height of instrument as 1.565m to a target height 2.165m. If the elevation of the instrument station is 189.250m above mean sea level, find the elevation of staff station. Assume any data, if required. |