Handbook for Government Surveyors |
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Page 5
... 120 111 61 64 19 41 61 64 15 16 74 98 . 135 52- 31 32 53 , 54 75 . 77 110 14 74 108 113 70 49 24 , 43 , 50 43 , 50 58 33 33 40 35 to 40 114 150 87 101 77 Plate 1 Compass , Variation of Compression of earth Compression of latitude INDEX. ...
... 120 111 61 64 19 41 61 64 15 16 74 98 . 135 52- 31 32 53 , 54 75 . 77 110 14 74 108 113 70 49 24 , 43 , 50 43 , 50 58 33 33 40 35 to 40 114 150 87 101 77 Plate 1 Compass , Variation of Compression of earth Compression of latitude INDEX. ...
Page 6
South Australia. Surveyor-General's Office. Compass , Variation of Compression of earth Compression of latitude Conical projection of maps Convergence of meridians Conversion of arc and distance Chart of southern stars Checking section ...
South Australia. Surveyor-General's Office. Compass , Variation of Compression of earth Compression of latitude Conical projection of maps Convergence of meridians Conversion of arc and distance Chart of southern stars Checking section ...
Page 14
... Earth's Radius = Correction . which does not in the case of any of them exceed 20 inches . 13. The work of observing the horizontal angles of trigono- metrical stations is generally confined to morning and evening hours , as distant ...
... Earth's Radius = Correction . which does not in the case of any of them exceed 20 inches . 13. The work of observing the horizontal angles of trigono- metrical stations is generally confined to morning and evening hours , as distant ...
Page 15
... earth . There is also sometimes a slight apparent change in the position of objects sighted , caused by vibration of the air when heated by the sun's rays . A 7 - inch theodolite by Troughton and Simms , carry- ing two or more verniers ...
... earth . There is also sometimes a slight apparent change in the position of objects sighted , caused by vibration of the air when heated by the sun's rays . A 7 - inch theodolite by Troughton and Simms , carry- ing two or more verniers ...
Page 17
... earth . This quantity , called " Spherical excess , " may be determined , with sufficient precision by dividing the ... earth's surface . For example , by tables we find the sine of a second is 0000048481368 , the area of a square second ...
... earth . This quantity , called " Spherical excess , " may be determined , with sufficient precision by dividing the ... earth's surface . For example , by tables we find the sine of a second is 0000048481368 , the area of a square second ...
Common terms and phrases
ADELAIDE adjustment aneroid azimuth Barometer bubble calculated camp chain chainage clamp colat column Const corresponding cosec cosine cross hairs declination degrees diameter diff difference of longitude dist divided DUMPY LEVEL earth east elongation equal equator EXAMPLE formula gives GOVERNMENT PHOTOLITHOGRAPHER Height in Feet Hill horizontal angle hour angle hypsometer inches index error instrument intersection length logarithm Mean Refract merid meridian passage method miles and decimals mins minutes multiplied Nautical Almanac noted number of seconds observed altitude observed angles offset pegs plate point of Aries polar distance prime vertical radius of curvature readings right ascension sextant side sidereal sight sine spherical excess square root star star's stations Steel Tape subtract sun's centre survey surveyor taken tangential angles telescope Temp theodolite Thermometer triangle true bearing true meridian vernier zenith distance ΙΟ
Popular passages
Page 18 - The light reflected from the paper will show the cross hairs in the telescope of the theodolite. Then, let the vertical spider's line be brought exactly upon the polestar, and, if it is an eastern elongation that is to be observed, and the star has not yet reached the most easterly point, it will move from the line toward the east, and the reverse when the elongation is west. At the...
Page 134 - Sun from the meridian, at the instant when the true point of intersection of the ecliptic and equator (called the first point of Aries) is on the meridian of Greenwich ; and as the distance of the first point of Aries from the meridian, at the instant the mean Sun is on the meridian, is denominated Sidereal Time at Mean Noon, this may, by analogy, be termed the Mean Time at Sidereal Noon. It is the time...
Page 113 - Act contained shall take away or affect any right of action or other remedy which any person may have in respect of any loss or damage occasioned by any fire or for any trespass committed.
Page 134 - ... it may also be regarded as the arc of the equinoctial intercepted between those circles. It is measured toward the west as a positive direction through...
Page 62 - ... perfect the exhaustion. The actual movement at the centre of the elastic box, from whence the indications emanate, is very slight ; but this is increased 657 times at the point of the hand ; so that a movement to the extent of...
Page 122 - W ) v 2 (W) equal the sum of the weights for the mean of each night. The observations for longitude were submitted to Professors GP Bond and James Major for computation. Table "B...
Page 19 - ... line of sight not being at right angles to the axis of vertical motion 18.
Page 28 - Observed horizontal angle 77° 45' between Canopus and /3 Tri. Aus., at opposite elongations, pol. dis. 37° 22
Page 30 - ... will be the logarithm of the number of seconds and decimals in the arc — that is, no'oo.
Page 134 - Right ascension of the meridian is the hour angle of the first point of Aries.