the world > the earth > earth sciences > geography > map-making > surveying > [adjective] > of instruments for surveying > relating to specific instruments (5)
= dioptric, adj. 1. Obsolete.
Of the nature of, or pertaining to, a diopter, n. 1. Obsolete.
Of, relating to, or done by means of a measuring rod or surveyor's staff. Cf. perch, n.1 2.
pertaining to a tacheometer or tacheometry.