| 单词 | spot height |
| 释义 | > as lemmasspot height spot height n. Surveying and Cartography the height of a point above a datum line (usually mean sea level); an indication of this on a map; colloquial an elevated point on the ground, the height of which is indicated on a map. ΘΚΠ the world > the earth > earth sciences > geography > map-making > surveying > [noun] > datum for heights > spot height spot level1886 spot height1911 1911 Surveyor (Sydney) Sept. 160 The heights of contours should..be shown at their extremities, and the top of hills, if not a contour, should have spot heights printed on. 1953 G. R. Crone Maps & their Makers ix. 138 The earliest British map to include spot heights appears to be Christopher Packe ‘Physico-chorographical chart’ of Kent, 1743. 1977 D. Beaty Excellency vi. 74 He drew his track on the maps and charts..and memorized the spot-heights over the Alps. 2004 Trail May 97/3 Follow the fence eastwards to climb past a pronounced spot height. < as lemmas |
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