(n) :
Any fixed structure that marks a measuring point used in triangulation.
(n) :
(British) A fixed pillar with a metal housing for a theodolite on the top of a high point in the landscape; originally used for making Ordnance Survey maps.
(n) :
Any fixed structure that marks a measuring point used in triangulation.
(n) :
(British) A fixed pillar with a metal housing for a theodolite on the top of a high point in the landscape; originally used for making Ordnance Survey maps.