Question-Answer:
Which one of the following statements is NOT correct?
- (a) Trigonometric levelling has never been used in geodetic surveys
- (b) The differences in elevation are determined indirectly by trigonometric levelling
- (c) The electronic distance measurement devices can be used for measuring the vertical
distances
- (d) The combined effects of curvature and refraction produce vertical readings that are slightly too short
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Question-Answer civil engineering study |