Handbook for Government Surveyors |
From inside the book
Results 1-5 of 37
Page 3
... side the Government Service will probably find it useful in the exercise of their profession . E. M. SMITH , January 21st , 1914 . Surveyor - General . INDEX . Accounts Adjustment of Y theodolite Adjustment of transit 196836 ...
... side the Government Service will probably find it useful in the exercise of their profession . E. M. SMITH , January 21st , 1914 . Surveyor - General . INDEX . Accounts Adjustment of Y theodolite Adjustment of transit 196836 ...
Page 17
... sides can be made with all needful accuracy . area Briefly , Excess in seconds = in which r2 X Sine I " r = normal for lat . at centre of triangle . The area of a triangle excess in seconds radius X sine I " . 2 * This term gives an arc ...
... sides can be made with all needful accuracy . area Briefly , Excess in seconds = in which r2 X Sine I " r = normal for lat . at centre of triangle . The area of a triangle excess in seconds radius X sine I " . 2 * This term gives an arc ...
Page 20
... sides of the meridian ; then the discrepancy between the results may be assumed to be due to error of latitude , and the mean may be regarded as correct if the observations have been properly performed . It is well to note that an ...
... sides of the meridian ; then the discrepancy between the results may be assumed to be due to error of latitude , and the mean may be regarded as correct if the observations have been properly performed . It is well to note that an ...
Page 21
... side ; then half the difference of the two bearings is the direction of the true meridian . If the object selected be a star at both its elongations , no better result could be desired . Another method which may be successfully ...
... side ; then half the difference of the two bearings is the direction of the true meridian . If the object selected be a star at both its elongations , no better result could be desired . Another method which may be successfully ...
Page 24
... sides of the zenith are alternately observed , errors due to refraction and personal equation are reduced to a minimum . It may happen that discrepancies reveal them- selves between the north and south observations , but this does not ...
... sides of the zenith are alternately observed , errors due to refraction and personal equation are reduced to a minimum . It may happen that discrepancies reveal them- selves between the north and south observations , but this does not ...
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.