Back-sight: Difference between revisions
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A level observation, or sighting back, to a turning point or bench mark of known elevation. A [[transit | transit observation]] on a previously located point in the rear. A fixed object in the rear which is sighted upon from time to time to check the orientation of the transit. | A level observation, or sighting back, to a turning point or bench mark of known elevation. A [[transit | transit observation]] on a previously located point in the rear. A fixed object in the rear which is sighted upon from time to time to check the orientation of the transit. | ||
[[Category:Glossary]] | [[Category:Glossary]] | ||
[[Category:Surveying]] | [[Category:Surveying]] | ||
Latest revision as of 19:01, 31 December 2007
A level observation, or sighting back, to a turning point or bench mark of known elevation. A transit observation on a previously located point in the rear. A fixed object in the rear which is sighted upon from time to time to check the orientation of the transit.