Surveying ; a manual of practical instruction in the art of plane surveying, including plotting, leveling, triangulation, line running, cross-sectioning, traversing, and other details of field work (1910)
American School of Correspondence, Phillips, Alfred Edward, 1863- [from old catalog] · Chicago, American school of correspondence · leaf 194
hich is the amount of shortening of each tape-length. This cor-rection is always negative. If there had been 80 full tape-lengths in measured l>ase-line.the total corrections for sag would be S6 X .01(32 = 1.393 feet. THE PLANE=TABLE. Construction. The y)lane-table consists essentially of a… … PLANE SURVEYING 175 to permit the board to he turned iu aziiiiutli and to be clamped inany position. The instrument is designed to at onee sketch in the field, toscale, the lengths and relative directions of all lines and the posi-tions of objects to be included in the survey. For drawingstraight…
Surveying
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