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 100
TRlCQSJOHETRttAL AfA/CA* B4S«£7 J/C.v … Fig. 82.—Survey Beacon, Alaska.(From Putnam1s Nautical Charts.) g 82 MAPS AND MAP-MAKING the important thing is to ensure their being readily visibleat a distance. One of the best methods of marking stationsis by flashing signals with the heliostat (Fig. 83). The next figures (Figs. 84, 85)…
Cartography · Surveying
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