| 单词 | trig point |
| 释义 | > as lemmastrig point = trigonometrical adj. Frequently in trig point, trig station. ΘΚΠ the world > relative properties > number > geometry > [adjective] > branches of > of trigonometry sinical1593 trigonometrical1666 trigonometric1811 trig1862 the world > the earth > earth sciences > geography > map-making > surveying > [noun] > trig point or station trigonometrical station1860 trig station1926 trig point1936 1862 McLean Papers (MS.) XX. 87 Mr Swainson informs me that the Trig Station pulled down was not one erected by him. 1926 J. Devanny Lenore Divine xx. 184 They reached the trig station at the top, two thousand five hundred feet above sea-level. 1936 H. S. L. Winterbotham Key to Maps iii. 28 On the ordnance maps and plans you will find..little triangles with dots inside... Each one represents a place fixed by careful instrumental measurement, and the sum total represents the skeleton..upon which all our maps depend... ‘Trig. Points’, represented by the triangles, control the map in plan, ‘Bench-marks’ in height. 1959 J. Braine Vodi vi. 92 I've not done those trig. problems. 1968 G. R. Crone Maps & their Makers xi. 143 Transference of the trig. points to the sheets issued to the plane tablers. 1981 Times Lit. Suppl. 22 May 577/1 Surveyors had to be trained [for Ordnance Survey mapmaking]; trig-points and bench~marks established. < as lemmas |
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