QUESTION 11 Match the following are mistakes, systematic errors, or random errors. The answer might repeat. Earth curvature and refraction A. Mistake Imperfect centering over a point. В. Random error Recording a length of 135.48 as 135.44. C. Systematic error Reading of horizontal circle on a total station.

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.

Trigonometric Leveling - correct for curvature and refraction Elevation of Point A = 630.57' Zenith angle from Point A to Point B = 84°-22'-15" Slope distance from Point A to Point B = 1,760.00 What is the elevation of Point B? answer to 2nd decimal place example answer 200.87 - don't enter units Your Answer: Answer