Aid to survey-practice

Absc Abscissa accuracy adjustment adopted altitude angular measurement angular observation appliances axis azimuth base line bearings calculation chain survey chord compass survey convenient correct corresponding cos² cosec cotg curvature curve detail determined direction distances and offsets distant point engineering error extremity feet FIGURE fixed formulæ Gartok given graduated ground Gunter's chain height hence horizontal angle inch inclination instrument latitude length level-staff longitude lunar distance marked mean ment meridian method micrometer mile mode necessary object obtained operations pegs plane plates plotting position practical principle purposes radius radius of curvature reading recorded rectangular offsets reduced refraction right angles right ascensions Route Surveys scale screws Section set-out setting-out sextant side sin² spherical spherical excess staff station staves subtended survey line surveyor tangent telemeter telescope theodolite tion traverse triangles Trigonometrical Trigonometrical Survey verified vertical wires