## Elements of surveying, and navigation: with descriptions of the instruments and the necessary tables |

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### Common terms and phrases

axis azimuth back-sight base line bearing called centre column comp contour lines cosine Cotang course decimal degrees determined difference of latitude difference of level direction divided double meridian distance draw east error example feet figure fore-sight given angle given line given point ground half hence horizontal distance horizontal line horizontal plane inches instrument intersection latitude and departure length limb line of collimation logarithm longitude marked measure miles multiplied needle paper parallel PARALLEL SAILING passing perpendicular plane of reference plane sailing plane triangle protractor quotient radius right angles right-angled triangle rods scale of chords scale of equal secant sides sights similar triangles sine spherical excess spider's lines square chains staff stakes straight line subtract surface survey Tang tangent telescope theodolite trigonometrical variation vernier plate vertical yards