Alidad
01
a surveying instrument used with a plane table to sight distant objects, draw lines of sight, and measure angles
专业
语法信息
例子
The surveyor used an alidad to accurately measure the property boundaries.
02
the upper rotating part of a theodolite, including the telescope and its attachments
专业
例子
The geologist adjusted the alidad on the theodolite to take precise measurements of the rock formation.
