Maps and map-making; three lectures delivered under the auspices of the Royal geographical society (1910)
Reeves, Edward Ayearst, 1862-1945, Royal Geographical Society (Great Britain) · London, The Royal geographical society · leaf 101
84, 85) showtriangulators with theodolites atwork. The surveyor has to be aman of great resource, and manyexpedients are resorted to in fixingup a theodolite in a favourableposition for taking a round ofangles. The man in the photo-graph (Fig. 86) is one of theUnited States Government sur-veyors,… … Fig. 83.—Heliostat.
Cartography · Surveying
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