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 108
of a man on the earth beneath the pointZ. Let the circle NESW represent the horizon line, Zthe observers zenith, P the north pole, EQW the equator,QZ the latitude of the place of which ZP is the complement,X the sun, PX the north polar distance of the sun obtainedfrom its declination, ZX the suns… … Fig. 90.—Indian Government Surveyor taking Observations. sun from the meridian, or, as it is called, the suns hour angle.Now, we know that when the sun is on the meridian of anyplace, it is Apparent Noon at that place, therefore, as we knowthe hour angle, or how far the sun is from the meridian,…
Cartography · Surveying
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