Elements of Surveying with a Description of the Instruments and the Necessary Tables Including a Table of Natural Sines |
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Page 44
... yards . Required the other parts . INSTRUMENTALLY . A B Draw an indefinite straight line AB , and from the scale of equal parts lay off AB equal to 408. Then at A lay off an angle equal to 58 ° 07 ' , and at B an angle equal to 22 ° 37 ...
... yards . Required the other parts . INSTRUMENTALLY . A B Draw an indefinite straight line AB , and from the scale of equal parts lay off AB equal to 408. Then at A lay off an angle equal to 58 ° 07 ' , and at B an angle equal to 22 ° 37 ...
Page 53
... yard , a rod , or any other ascertained distance . 83. The measure in general use , is a chain of four rods or sixty - six feet in length ; it is called Gunter's chain , from the name of the inventor . This chain is composed of 100 ...
... yard , a rod , or any other ascertained distance . 83. The measure in general use , is a chain of four rods or sixty - six feet in length ; it is called Gunter's chain , from the name of the inventor . This chain is composed of 100 ...
Page 67
... yards . . 9.926431 . 2.778151 2.778231 To find the distance AC . 57 ° 34 ' ar . comp . As sin C : sin B 64 ° 51 ' . :: AB .600 : AC 643.94 yards PROBLEM II . · 0.073649 9.956744 • 2.778151 • 2.808544 To determine the altitude of an ...
... yards . . 9.926431 . 2.778151 2.778231 To find the distance AC . 57 ° 34 ' ar . comp . As sin C : sin B 64 ° 51 ' . :: AB .600 : AC 643.94 yards PROBLEM II . · 0.073649 9.956744 • 2.778151 • 2.808544 To determine the altitude of an ...
Page 68
... yards , the horizontal angle CBA - 410 24 ' , the horizontal angle CAB = 96o 28 ' , and the angle of elevation DBC - 10 ° 43 ' . In the triangle BAC , to find the horizontal distance BC . The angle BCA = 180 ° - ( 41 ° 24 ′ + 96 ° 28 ...
... yards , the horizontal angle CBA - 410 24 ' , the horizontal angle CAB = 96o 28 ' , and the angle of elevation DBC - 10 ° 43 ' . In the triangle BAC , to find the horizontal distance BC . The angle BCA = 180 ° - ( 41 ° 24 ′ + 96 ° 28 ...
Page 70
... yards found A = 15 ° 36 ' DBC 27 ° 29 ' ; required the altitude DC . First : ADB - DBC - A = 27 ° 29 ' - 15 ° 36'11 ° 53 ' . In the triangle ADB , to find BD . As sin D 11 ° 53 ' · • ar . comp . • 0.686302 : sin A • 15 ° 36 ' • 9.429623 ...
... yards found A = 15 ° 36 ' DBC 27 ° 29 ' ; required the altitude DC . First : ADB - DBC - A = 27 ° 29 ' - 15 ° 36'11 ° 53 ' . In the triangle ADB , to find BD . As sin D 11 ° 53 ' · • ar . comp . • 0.686302 : sin A • 15 ° 36 ' • 9.429623 ...
Common terms and phrases
acres 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 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 latitude and departure length levelling screws line AC line of collimation logarithm M.
M. Sine marked measure method multiplied natural sines needle object paper parallel passing perpendicular piece of land pins plane of reference protractor radius right angles right-angled triangle rods scale of equal secant side similar triangles spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards