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Quadrant (instrument)

A quadrant is an instrument used to measure angles up to 90°. Different versions of this instrument could be used to calculate various readings, such as longitude, latitude, and time of day. It was first proposed by Ptolemy as a better kind of astrolabe. Several different variations of the instrument were later produced by medieval Muslim astronomers.…

History, Types & Geometric quadrant

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Geometric quadrant

Framed quadrant

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Quadrant (instrument)

Nodes62
Edges61
Triples3
Avg. degree1.97
Density0.032258
Components1

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quadrant instrument used quadrants could sun astronomical altitude use astrolabe one time measure also latitude would first several instruments graduated

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SubjectPredicateObjectConfidenceSrc
Maragehinstance ofin observatories0.80text
Reyinstance ofin observatories0.80text
Samarkandinstance ofin observatories0.80text

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