Text Book of Topographical and Geographical Surveying |
Common terms and phrases
accuracy accurate adjustment Angle-Book approximate astronomical axis azimuth barometer base bubble celestial sphere centre Chapter Chron chronometer chronometer watches circle clinometer collimation computed contours correction cosec cross-wires determined Diff difference in longitude earth equator field sheet fixed geodetic graticule height hill horizontal angles hour angle hypsometer Inches instant of observation instrument intersected points interval invar LATI latitude latitude and longitude Length in feet Logarithm longitude mark mean measured meridian method miles moon moon's Nautical Almanac necessary object-glass observed altitude obtained occultation Ordnance Survey parallax parallel plane plane-table plane-tabler Plate plotted plumb-bob pole polyconic projection position probable error projection rays readings rectangular co-ordinates refraction right angles right ascension scale screw side signal South spherical excess staff star surface surveyor Table tacheometer taken tape telescope theodolite topographical maps topographical survey transit triangulation tripod TUDE vernier vertical angles wire zenith distance