A theodolite is used in locating points from a station the elevation of which is 243.39m. The instrument constants are K=100 and C=0. The height of the instrument above the station is 1.37m. Compute the horizontal distances and the elevations. *Note: Zenith Angle is the angle from the vertical line (from the point above the observer). Object Stadia interval, m Rod Reading, m Zenith Angle 114 0.994 1.10 80°31' 115 1.400 1.77 84°10' 116 0.664 1.43 95°24' 117 1.520 1.31 94°35' 118 2.481 1.95 96°30' Answers Object Horizontal Distance to object (in meters) 114 115 116 117 118 Elevation (in meters)

In trying to minimise errors that come with using a tape in linear measurements, Mapalo suggested to the class that an EDM be used to compute the distance from BM1 to point A. A distance of 2122.241m was measured. Given that a frequency of 1.4985MHz was used, speed of light c = 299792458m/s,  the refraction index of 1.0003 and that the effective wavelength measures to a centimetre,  determine the phase measurement (i.e. Phase Distance and the corresponding Phase angle)

A transit with stadia interval factor of 100.8 was set up at point C on the line between points A and B. The following readings were observed: HAIR READINGS ROD VERTICAL ANGLE UPPER MIDDLE LOWER A +15-25 1.972 1.854 1.732 В -09-07 1.330 1.175 1.010 If the distance from the instrument to the focus is 0.38m, determine the following: a) Horizontal distance between A and B. b) Difference in elevation between A and B.

The height of instrument is 75.05m and the foresight on a turning point is 1.83m. After the instrument has been moved forward and set-up in a new position, the backsight on the turning point is 2.92m. The rod readings on station 1, station 2 and station 3 are 1.59m 1.92m and 2.29m respectively. a.Compute the new height of instrument. b. Compute the difference in elevation between turning point and point 3. c. Compute the elevation of station