Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |
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Page 66
... horizontal . This is called the true 0 of the limb . If the instrument be accurately constructed , and the parts have not been disarranged , this ... distance to a point Distances . 66 ELEMENTS OF SURVEYING . Heights and Distances,
... horizontal . This is called the true 0 of the limb . If the instrument be accurately constructed , and the parts have not been disarranged , this ... distance to a point Distances . 66 ELEMENTS OF SURVEYING . Heights and Distances,
Page 67
... horizontal distance to a point which is inacces- sible by reason of an intervening river . 88. Let C be the point ... horizontal angles CAB and CBA . B Let us suppose that we have found AB = 600 yards , CAB = 57 ° 35 ' and CBA - 64 ...
... horizontal distance to a point which is inacces- sible by reason of an intervening river . 88. Let C be the point ... horizontal angles CAB and CBA . B Let us suppose that we have found AB = 600 yards , CAB = 57 ° 35 ' and CBA - 64 ...
Page 68
... horizontal base line , as BA ; and at the ex- tremities B and A , measure the horizontal angles CBA and CAB ... distance BC . = The angle BCA 180 ° - ( 41 ° 24 ' + 96 ° 28 ′ ) = 42 ° 08 ′ = C. As sin C · • 42 ° 08 ′ ar . comp ...
... horizontal base line , as BA ; and at the ex- tremities B and A , measure the horizontal angles CBA and CAB ... distance BC . = The angle BCA 180 ° - ( 41 ° 24 ' + 96 ° 28 ′ ) = 42 ° 08 ′ = C. As sin C · • 42 ° 08 ′ ar . comp ...
Page 69
... distance , which is represented by BA , is the same , whether the station A is on the same level with B , above it , or below it ( Art . 74 ) . The horizontal ... horizontal line through A should cut the vertical line DC , at any point ...
... distance , which is represented by BA , is the same , whether the station A is on the same level with B , above it , or below it ( Art . 74 ) . The horizontal ... horizontal line through A should cut the vertical line DC , at any point ...
Page 70
... horizontal plane ; and therefore can only be used when the line AB is nearly horizontal . Let us suppose that we ... distance of an ᎠᏟ 2.769093 • · 587.61 70 ELEMENTS OF SURVEYING .
... horizontal plane ; and therefore can only be used when the line AB is nearly horizontal . Let us suppose that we ... distance of an ᎠᏟ 2.769093 • · 587.61 70 ELEMENTS OF SURVEYING .
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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