| 21. | To turn angles a theodolite was used.
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| 22. | He learnt about the technical aspects of astronomical sightings and how to use a theodolite.
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| 23. | Each measurement made by theodolite during the retriangulation was repeated no fewer than 32 times.
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| 24. | The 1787 report is witness to how Roy occupied himself whilst waiting for the theodolite.
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| 25. | High-accuracy transits or theodolites were used, and angle measurements repeated for increased accuracy.
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| 26. | The helicopter flies towards the theodolite and is tracked by the telescope in elevation and azimuth.
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| 27. | Ramsden made at least one other 3ft . theodolite of which parts were discovered in Switzerland.
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| 28. | The ordinary methods of surveying with a theodolite, bush, or broken up by ravines.
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| 29. | Typically, engineers use a surveying instrument called a theodolite to calculate how much a building leans.
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| 30. | The main surveying instruments in use around the world are the theodolite, tripod when in use.
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