Elements of Surveying and Leveling: With Descriptions of the Instruments, and the Necessary Tables |
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Page 7
... Meridian Distances and Area ..... 129-140 Problems ....... 140-145 Laying Out and Dividing Land ......... .. 145-153 Public Lands .... 153-157 Variation of the Needle 157-162 To find the true Meridian 162 SECTION IV . TRIANGULATION ...
... Meridian Distances and Area ..... 129-140 Problems ....... 140-145 Laying Out and Dividing Land ......... .. 145-153 Public Lands .... 153-157 Variation of the Needle 157-162 To find the true Meridian 162 SECTION IV . TRIANGULATION ...
Page 108
... meridian plane ; and its intersection with the surface is called a meridian line , or simply a meridian . 65. All the meridians converge towards the poles , but they vary so little from parallelism , within the narrow limits of surveys ...
... meridian plane ; and its intersection with the surface is called a meridian line , or simply a meridian . 65. All the meridians converge towards the poles , but they vary so little from parallelism , within the narrow limits of surveys ...
Page 109
... meridian , the bearing is read , north 46 ° east , and is written , N. 46 ° E. When the course , like AC , falls between the north and west points , and makes with the meridian an angle of 30 ° , the bearing is read , north 30 ° west ...
... meridian , the bearing is read , north 46 ° east , and is written , N. 46 ° E. When the course , like AC , falls between the north and west points , and makes with the meridian an angle of 30 ° , the bearing is read , north 30 ° west ...
Page 110
... meridian distance of a point is its perpendicular distance from any assumed meridian . Thus , if the distance be estimated from the meridian NS , BC will be the meridian dis- tance of the point B. 73. The meridian distance of a line , is ...
... meridian distance of a point is its perpendicular distance from any assumed meridian . Thus , if the distance be estimated from the meridian NS , BC will be the meridian dis- tance of the point B. 73. The meridian distance of a line , is ...
Page 111
... meridian . In the interior of the compass - box , there is a graduated circle divided to degrees , and sometimes to half degrees : the degrees are numbered from the extremities of the diameter NS , both ways to 90 ° . The length of the ...
... meridian . In the interior of the compass - box , there is a graduated circle divided to degrees , and sometimes to half degrees : the degrees are numbered from the extremities of the diameter NS , both ways to 90 ° . The length of the ...
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Common terms and phrases
Applying logarithms axis azimuth back-sight base-line bearing chord clamp-screw column compass contour lines corresponding Cosine Cosine D Cotang course curve decimal degree of curvature degrees determined difference of level divided double meridian distance draw drawn east error example feet field-notes fore-sight given angle given line given point ground height of instrument hence horizontal angles horizontal distance horizontal plane inch intersection latitude and departure length limb line of collimation M.
M. Sine mantissa marked measured method multiplied notes offsets paper parallel passing perpendicular plane of reference plot position prismoid protractor radius reading right angles scale of equal screws secant side sights Sine D slope spider's lines stakes station subtract surface survey taken Tang tangent theodolite traverse vernier plate vertical plane wwwwwwwww yards
Popular passages
Page 56 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Page 12 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 17 - The minutes in the left-hand column of each page, increasing downwards, belong to the degrees at the top ; and those increasing upwards, in the right.hand column, belong to the degrees below.
Page 37 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Page 12 - The logarithm of a quotient is equal to the logarithm of the dividend minus the logarithm of the divisor.
Page 10 - When a number lies between 1 and 10, its logarithm lies between 0 and 1; that is, it is equal to 0, plus a decimal; if a number lies between 10...
Page 9 - The logarithm of a number is the exponent of the power to which it is necessary to raise a fixed number, in order to produce the first number.
Page 11 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.
Page 130 - MC; hence, the double meridian distance of a course is equal to the double meridian distance of the preceding course, plus the departure of that course, plus the departure of the course itself : if .there is no preceding course, the first two terms become zero.
Page 38 - The secant of an arc is the line drawn from the centre of the circle through one extremity of the arc, and limited by the tangent passing through the other extremity. Thus, 00 is the secant of the arc AB.