Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |
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Page 24
... distance from a to the first horizontal line above ab , is one - tenth of the distance ad , and af is one - tenth of df : but it follows that the distance measured on that line between ad 24 INTRODUCTION . Diagonal Scale of Equal Parts,
... distance from a to the first horizontal line above ab , is one - tenth of the distance ad , and af is one - tenth of df : but it follows that the distance measured on that line between ad 24 INTRODUCTION . Diagonal Scale of Equal Parts,
Page 52
... horizontal distance be- tween two points , is the horizontal line intercepted between the two vertical lines passing through those points . Thus , DC or AB is the horizontal distance between the two points A and C , or the points B and ...
... horizontal distance be- tween two points , is the horizontal line intercepted between the two vertical lines passing through those points . Thus , DC or AB is the horizontal distance between the two points A and C , or the points B and ...
Page 54
... horizontal strip of iron to prevent the chain from slipping off ; these staves are to be passed ... distance is passed over . Great care must be taken to keep the chain horizontal 54 ELEMENTS OF SURVEYING . To Measure a Horizontal Line,
... horizontal strip of iron to prevent the chain from slipping off ; these staves are to be passed ... distance is passed over . Great care must be taken to keep the chain horizontal 54 ELEMENTS OF SURVEYING . To Measure a Horizontal Line,
Page 55
... horizontal distance between the stations . A For example , in measuring the horizontal distance between and C , we first place a staff at A and another at b , in the direction towards C. Then slide up the chain on the staff at A until ...
... horizontal distance between the stations . A For example , in measuring the horizontal distance between and C , we first place a staff at A and another at b , in the direction towards C. Then slide up the chain on the staff at A until ...
Page 57
... distance of any object to which the upper telescope is directed , above or below the place of the instrument , in 100th parts of the horizontal distance the other , the difference between the hypothenusal and base lines : the ...
... distance of any object to which the upper telescope is directed , above or below the place of the instrument , in 100th parts of the horizontal distance the other , the difference between the hypothenusal and base lines : the ...
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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