121. Check lines (or proof lines) in Chain Surveying, are essentially required
122. A negative declination shows that the magnetic meridian is to the
123. The latitude of the observer's position, is
124. If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be
125. At the first point of Aeries, the sun moves
126. The cross hairs in the surveying telescope are placed
127. The most convenient co-ordinate system for specifying the relative positions of heavenly bodies on the celestial sphere, is
128. The smaller horizontal angle between the true meridian and a survey line, is known
129. If $$\delta $$ is the declination of the Polaris and $$\lambda $$ is the latitude of the place, the azimuth of the Polaris, is
130. The difference in longitude of two places expressed in time is equal to the difference in their
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