Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |
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Page 21
... paper . Construction of Problems . 18. Drawings , or delineations on paper , are the copies of things which they are intended to represent . In order that these copies may be exact , their different parts must bear the same proportion ...
... paper . Construction of Problems . 18. Drawings , or delineations on paper , are the copies of things which they are intended to represent . In order that these copies may be exact , their different parts must bear the same proportion ...
Page 23
... paper , so that one of the sides of the triangle shall coincide exactly with AB : the triangle being below the line . Then placing the thumb and fingers of the left hand firmly on the ruler , slide the triangle with the other hand along ...
... paper , so that one of the sides of the triangle shall coincide exactly with AB : the triangle being below the line . Then placing the thumb and fingers of the left hand firmly on the ruler , slide the triangle with the other hand along ...
Page 25
... paper , its length can be found by taking it in the dividers and applying it to the scale . SCALE OF CHORDS . D90 08 70 60 9 : 0 8 : 0 70 60 50 3 : 0 20 1,0 A 20 23. If , with any radius , as AC , we describe the quadrant CD , and then ...
... paper , its length can be found by taking it in the dividers and applying it to the scale . SCALE OF CHORDS . D90 08 70 60 9 : 0 8 : 0 70 60 50 3 : 0 20 1,0 A 20 23. If , with any radius , as AC , we describe the quadrant CD , and then ...
Page 26
... instrument is used to lay down , or protract angles . it may also be used to measure angles included between lines already drawn upon paper . It consists of a brass semicircle ABC divided to half INTRODUCTION . Semicircular Protractor,
... instrument is used to lay down , or protract angles . it may also be used to measure angles included between lines already drawn upon paper . It consists of a brass semicircle ABC divided to half INTRODUCTION . Semicircular Protractor,
Page 28
... paper , on such a scale that any number of parts of the line , 40 for example , shall be represented by one inch on the paper , or by any part of an inch , take the inch , or part of the inch from the scale of inches on the sector ...
... paper , on such a scale that any number of parts of the line , 40 for example , shall be represented by one inch on the paper , or by any part of an inch , take the inch , or part of the inch from the scale of inches on the sector ...
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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 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 hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection LatDegDegDegDeg Distance 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 plane of reference protractor radius right angles right-angled triangle rods scale of equal secant side sights similar triangles Sine Sine spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards