Hinks, Arthur R. (Arthur Robert), 1873-1945 · Cambridge, University press · leaf 109
uentcontrol is not necessary. But it is essential to control thegeneral accuracy of a compass traverse by taking a true azimuthfrom time to time, and an example will illustrate the wholeprocess. Before starting in the morning the traveller may be informedby his guides that the days march will take… … Fig. 5. Observation of Azimuth. circle and the Suns altitude. From the altitude, and an approxi-mate knowledge of the latitude, the true azimuth of the Sun canbe calculated. Apply to this the angle between the Sun andthe distant point, as measured on the horizontal circle, and theazimuth of the…
Maps · Surveying
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