Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |
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Page 104
... latitude , and a single column for the departures . The + sign shows when the difference of latitude is north , and the sign , when it is south . The sign also shows when the departure is east , and the sign , when it is west ...
... latitude , and a single column for the departures . The + sign shows when the difference of latitude is north , and the sign , when it is south . The sign also shows when the departure is east , and the sign , when it is west ...
Page 106
... Lat . Dep . D. M. D. Area . + Area . 1 N 31 ° W 10 . +8.71 -5.24 +5.24 45.6404 2 * N 62 ° E 9.25 +4.40 +8.21 + ... departure of the course from 2 to 3 , which is the double meridian distance of that course , and plus . To this we ...
... Lat . Dep . D. M. D. Area . + Area . 1 N 31 ° W 10 . +8.71 -5.24 +5.24 45.6404 2 * N 62 ° E 9.25 +4.40 +8.21 + ... departure of the course from 2 to 3 , which is the double meridian distance of that course , and plus . To this we ...
Page 109
... latitude , was 132.40-21.25 = 111.15 . In like manner , if a bearing is due north or south , the error in departure is nothing ; and the sum of the courses must be diminished by this course , before balancing the columns of departure ...
... latitude , was 132.40-21.25 = 111.15 . In like manner , if a bearing is due north or south , the error in departure is nothing ; and the sum of the courses must be diminished by this course , before balancing the columns of departure ...
Page 121
... latitude - and ED departure , = AB cosine of bearing and BC sine of bearing . From similar triangles , we have , 1 AC : AB :: AD : ᎯᎠ : ᏁᎬ ; that is , cosine of bear . :: course dif . of lat . ; hence , dif . of latitude : = course ...
... latitude - and ED departure , = AB cosine of bearing and BC sine of bearing . From similar triangles , we have , 1 AC : AB :: AD : ᎯᎠ : ᏁᎬ ; that is , cosine of bear . :: course dif . of lat . ; hence , dif . of latitude : = course ...
Page 122
... latitude , and what the departure ? Natural cosine of 65 ° 39 ' .41231 Length of the course 69.41 Product , which is the Dif . of Latitude 28.6184371 . Natural sine of 65 ° 39 ' .91104 Length of the course 69.41 Product , which is ...
... latitude , and what the departure ? Natural cosine of 65 ° 39 ' .41231 Length of the course 69.41 Product , which is the Dif . of Latitude 28.6184371 . Natural sine of 65 ° 39 ' .91104 Length of the course 69.41 Product , which is ...
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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