alidad
9.9
A straight edge with sights used on a plane table, a flat table for drawing maps
- noun
- Specialized
:
alidad
- The surveyor carefully adjusted the alidad to align with the distant church steeple.
Examples
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Using the alidad, the engineers traced accurate lines on the map.
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The surveyor used an alidad to measure the angles accurately.
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The alidad is an essential tool for traditional plane table surveying.
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An alidad is essential for precise surveying.
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The alidad is an essential tool for traditional plane table surveying.
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The surveyor carefully adjusted the alidad to align with the distant church steeple.
-
Using the alidad, the engineers traced accurate lines on the map.
Synonyms
9.9
A tool used to measure directions or angles when mapping land
is the straightedge with sights used on a plane table to draw sight lines
Surface Forms
Etymology
Alidad comes from Spanish and before that from Arabic, where al- means 'the' and the rest named a measuring tool. So an alidad is a straightedge with sights used on a plane table to draw sight lines and measure directions.
