Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 62
Plane Suevet is that branch in which the curvatureof the earth is neglected; as it may be when the survey islimited to small portions of the surface. 3. Geodesic Surveying is when the curvature of theearth is taken into account, as it must be in all extensive surveys. 4. A Horizontal Plane, is a… … SEC. I.] LI^ES AND ANGLES. 59 5. A Horizontal Li^e, is a plane parallel to the water-level, or parallel to a horizontal plane. 6. A Yeetical Plaxe, is a plane pei-pendicular to a hori-zontal plane. 7. A Vertical Lixe, is a line peipendicnlar to a hori-zontal plane. 8. Oblique Lixes, are those which…
Surveying
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