Topographical Surveying: Including Geographic, Exploratory, and Military Mapping, with Hints on Camping, Emergency Surgery, and PhotographyJ. Wiley & Sons, 1900 - 910 σελίδες |
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
accuracy accurate adjustment alidade altitude aneroid angle astronomic axis azimuth backsight barometer base bench-marks camera Chap clamped Coast and Geodetic collimation column computed contour interval contour lines correction cross-hairs determined diff difference direction distance elevation employed equation error executed feet Geodetic Astronomy Geodetic Survey hachures height heliotrope Henry Gannett horizontal inches instrument intersection latitude length logarithms longitude means measured ment meridian meters method micrometer miles object observed obtained odometer parallel plane plane-table triangulation plate platted points Polaris position primary triangulation projection range-finder reduced refraction right ascension roads rodman scale screw sheet side sight signal sketching slopes spirit-leveling square miles stadia star station stream surface TABLE tangent tape telescope theodolite tion topographic map topographic survey transit trigonometric tripod U. S. Coast U. S. Geological Survey vernier vertical angulation zenith zenith telescope ΙΟ
Δημοφιλή αποσπάσματα
Σελίδα 214 - ... in the same direction as the motion of the hands of a watch (see also the rules outlined in Div.
Σελίδα 456 - In the space between any two contours are found elevations above the lower and below the higher contour. Thus the contour at 150 feet falls just below the edge of the terrace, while that at 200 feet lies above the terrace; therefore all points on the terrace are shown to be more than 150 but less than 200 feet above sea. The summit of the higher hill is stated to be 670 feet above sea; accordingly the contour at 650 feet surrounds it. In this illustration...