The Working Edge Of Alidade Is Known As

The working edge of alidade is known as fiducial edge.

Solution

An Alidade is a surveying instrument used in plane table surveying for sighting a point which needs to be located on a map.

• One edge of the alidade is the fiducial edge or bevelled edge and the other one is the graduated edge.
• Fiducial edge is known as working edge and graduated edge is used to draw line of sight on map.

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