Elements of Surveying and Leveling: With Descriptions of the Instruments, and the Necessary Tables |
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Page 62
... station just left , place the pin nearly in the right position : the exact aligning should be left , however , to the hind - chainman . When the distance is more than ten chains , the pins , when exhausted , should be returned to the ...
... station just left , place the pin nearly in the right position : the exact aligning should be left , however , to the hind - chainman . When the distance is more than ten chains , the pins , when exhausted , should be returned to the ...
Page 63
... his end of the chain carefully over the point or station , by means of the plumb - line , while he directs the fore - chainman in the usual manner . The point fixed in this manner , by the fore. SEC . I. ] 63 MEASUREMENT OF DISTANCES .
... his end of the chain carefully over the point or station , by means of the plumb - line , while he directs the fore - chainman in the usual manner . The point fixed in this manner , by the fore. SEC . I. ] 63 MEASUREMENT OF DISTANCES .
Page 84
... stations A and B , in such a manner that each can be seen from the other , and the point C from both of them . Then measure the horizontal angles B CAB and CBA , with an instrument adapted to that purpose . Let us suppose that we have ...
... stations A and B , in such a manner that each can be seen from the other , and the point C from both of them . Then measure the horizontal angles B CAB and CBA , with an instrument adapted to that purpose . Let us suppose that we have ...
Page 87
... station A is on the same level with B , above it , or below it . The horizontal angles CAB and CBA are also the same , so long as the point C is in the vertical line DC . Therefore , if the horizontal line through A should cut the ver ...
... station A is on the same level with B , above it , or below it . The horizontal angles CAB and CBA are also the same , so long as the point C is in the vertical line DC . Therefore , if the horizontal line through A should cut the ver ...
Page 88
... station B is above the station A. That is , - DE · DC - 283.66 218.64 = 65.02 = EC , which expresses the vertical distance that the station B is above the station A. NOTE 2. - It should be remembered , that the vertical dis- tance which ...
... station B is above the station A. That is , - DE · DC - 283.66 218.64 = 65.02 = EC , which expresses the vertical distance that the station B is above the station A. NOTE 2. - It should be remembered , that the vertical dis- tance which ...
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Common terms and phrases
axis azimuth back-sight base-line bench calculated centre cut chord column compass contour lines corresponding Cosine Cosine D course curve datum line decimal degree of curvature DEGREES determined difference of level direct the telescope divided double meridian distance draw drawn east elongation error example feet field-notes fore-sight ground height of instrument hence horizontal distance horizontal plane inches intersection latitude and departure length line of collimation mantissa marked measured method multiplied needle notes offsets paper parallel passing perpendicular plane of reference plane-table plot position prismoid protractor radius reading right angles screws secant section level side sights Sine Cotang Sine D slope stake spider's lines station subtract survey taken Tang tangent theodolite Transit survey traverse triangle true meridian vernier plate wwwwwwwww yards