Elements of Surveying with a Description of the Instruments and the Necessary Tables Including a Table of Natural Sines |
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Page 17
... extremities of a line are called points : a point , there- fore , has neither length , breadth , nor thickness , but position only . 3. A straight line is the shortest distance from one 2 * DEFINITIONS . 17 CHAPTER II Geometrical ...
... extremities of a line are called points : a point , there- fore , has neither length , breadth , nor thickness , but position only . 3. A straight line is the shortest distance from one 2 * DEFINITIONS . 17 CHAPTER II Geometrical ...
Page 27
... extremity of the arc with a pin . Remove the protractor , and draw a line through the point so marked and the angular point : this line will make with the given line the required angle . SECTORAL SCALE OF EQUAL PARTS . 90 100-110 120 ...
... extremity of the arc with a pin . Remove the protractor , and draw a line through the point so marked and the angular point : this line will make with the given line the required angle . SECTORAL SCALE OF EQUAL PARTS . 90 100-110 120 ...
Page 35
... extremity , and is limited by a line drawn through the other extremity and the centre of the circle . Thus , AC is the tangent of the arc AB . 47. The secant of an arc is the line drawn from the centre of the circle through one extremity ...
... extremity , and is limited by a line drawn through the other extremity and the centre of the circle . Thus , AC is the tangent of the arc AB . 47. The secant of an arc is the line drawn from the centre of the circle through one extremity ...
Page 41
... extremity of the diameter IE , since the right angle ICE must be inscribed in a semicircle . But CE is the tangent of CIE = 1 ( C4B ) ; and IH is the tangent of ICB = 1 ( C– B ) , to the common radius CI . But since the lines CE and IH ...
... extremity of the diameter IE , since the right angle ICE must be inscribed in a semicircle . But CE is the tangent of CIE = 1 ( C4B ) ; and IH is the tangent of ICB = 1 ( C– B ) , to the common radius CI . But since the lines CE and IH ...
Page 54
... extremity ; and place another at the point where the measurement is to be terminated . These two points are generally called stations . Having passed the staves through the rings of the chain , let the ten marking pins and one end of ...
... extremity ; and place another at the point where the measurement is to be terminated . These two points are generally called stations . Having passed the staves through the rings of the chain , let the ten marking pins and one end of ...
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