Finch, James Kip, 1883- · New York : John Wiley & Sons, Inc. · leaf 48
(6)Fig. 14.—Underfeatures. assumption that the ground has an even slope between thecontours. This assumption is generally justified for pointsalong streams, railroads and roads, but in some cases may bein error. To get the elevation of the ground, at the housein the center of the map, Fig. 10, for…
Cartography · Military maps
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