leveling,
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | the measurement process to determine height hight on maps ensures construction at correct gradient enables horizontal distance to be calaculate
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| principles of leveling | show 🗑
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| show | one that is at a constant height- realitive to the mean sea level and because it follows the mean surface it must be curved itself
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| Datum | show 🗑
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| Horizontal line | show 🗑
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| line of colimation | show 🗑
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| reduced level | show 🗑
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| show | reference marks or points, the reduced level of which have been accurately determined by levelling
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| show | established on Ordnance from datum at Newlyn, Cornwall
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| show | set up on stable points near construction sites where no OBM is found
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| collimation error | show 🗑
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| instrument set up midway between two points | show 🗑
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Created by:
anthonyokereke
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