Surveying
The allowable length of an offset depends upon the

All of these
degree of accuracy required
method of setting out the perpendiculars and nature of ground
scale of plotting

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Surveying
The First Point of Aeries

Is the point in the celestial sphere where zero meridian crosses the celestial equator
Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
Is usually denoted by the Greek letter ?
All listed here

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