Outline of the Method of Conducting a Trigonometrical Survey, for the Formation of Geographical and Topographical Maps and Plans: Military Reconnaissance, Levelling, Etc.; with the Most Useful Problems in Geodesy and Practical Astronomy, and Formulæ and Tables for Facilitating Their CalculationJohn Weale, 1862 - Всего страниц: 277 |
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accuracy acres adjustment altitude angles of elevation apparent ascertained astronomical axis azimuth barometer base boundaries calculated centre chain chronometer circle computed contour lines correction curvature declination degree depression determined diameter difference of longitude direction divisions earth engraving equal feet field-book fixed Géodesie given Greenwich Greenwich mean ground height horizontal hour angle inches index error instrument intersection interval laid latitude length limb lunar distance marked mean solar measured meridian method miles minute moon's Nautical Almanac necessary noon object obtained Ordnance Survey parallax parallel perpendicular pickets plane plate plotted pole portable portions purpose radius reading reduced refraction right ascension roads scale screw sections semidiameter sextant sidereal sides sketch slopes spherical spherical excess spirit level star stations subtracted surface Table taken tangent telescope temperature theodolite thermometer tion tracing transit triangles trigonometrical points Trigonometrical Survey tube vernier vertical wires zenith distance zero
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