Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |
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Results 6-10 of 19
Page 96
... sight , from B to A , is the angle ABH ; and since the meridians NS and HG are parallel , this angle is equal to the bearing NAB . The reverse bearing is , therefore , S 311o E. The reverse bearing from C , is S 634o W : that is , it is ...
... sight , from B to A , is the angle ABH ; and since the meridians NS and HG are parallel , this angle is equal to the bearing NAB . The reverse bearing is , therefore , S 311o E. The reverse bearing from C , is S 634o W : that is , it is ...
Page 97
... sight , is always equal to the forward bearing , and differs from it in both of the letters by which it is designated . 135. REMARK II . In taking the bearings with the com- pass , there are two sources of error . 1st . The inaccuracy ...
... sight , is always equal to the forward bearing , and differs from it in both of the letters by which it is designated . 135. REMARK II . In taking the bearings with the com- pass , there are two sources of error . 1st . The inaccuracy ...
Page 131
... sights be placed at right angles to the upper surface of the board , and let a nail be driven through the board , so ... sight is fastened , on the horizontal plank , and slide it east or west , until the aperture of the compass ...
... sights be placed at right angles to the upper surface of the board , and let a nail be driven through the board , so ... sight is fastened , on the horizontal plank , and slide it east or west , until the aperture of the compass ...
Page 132
... sights in the direction of it , and note the angle shown by the needle . Now , if the elongation , at the time of observation , were west , and the north end of the needle on the west side of the line , the azimuth , plus the angle ...
... sights in the direction of it , and note the angle shown by the needle . Now , if the elongation , at the time of observation , were west , and the north end of the needle on the west side of the line , the azimuth , plus the angle ...
Page 134
... sights . A ruler with a telescope , and a vertical limb , similar to the vertical limb of the theodolite , is ... sights to one of the objects , and note the degrees on the brass plate ; then turn the ruler and sights to the other ...
... sights . A ruler with a telescope , and a vertical limb , similar to the vertical limb of the theodolite , is ... sights to one of the objects , and note the degrees on the brass plate ; then turn the ruler and sights to the other ...
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Common terms and phrases
adjusted angle of elevation axis azimuth back-sights base line called centre clamp-screw coincide column comp compass Cosine D Cosine Sine Cotang course curve decimal DegDeg Distance degrees determined difference of level direction divided double meridian distance draw east elongation error example feet field notes figure given angle given line given point ground Gunter's chain half hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection LatDegDeg LatDegDegDegDeg Distance latitude and departure length levelling screws line AC line of collimation logarithm marked measure multiplied natural sines paper parallel passing perpendicular plane of reference protractor radius right angles rods scale of equal secant side sights similar triangles Sine D Sine Sine spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards