Plane Surveying |
Contents
Introduction ARTICLE 1 Definitions 1122 | 1 |
Purposes of Surveys 4 Instruments | 2 |
Measurement of Distances 5 Length of a Line | 3 |
Copyright | |
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Common terms and phrases
accuracy alidade azimuth backsight batter boards bench marks bubble tube celestial equator celestial sphere circle circular curve clamp closed traverse computed contour correction Cosine Cotang deflection angle determined Diff dist east edge engineer's scale equal error of closure established field notes grade line guide meridian horizontal cross hair horizontal distance illustrated in Fig initial point instrument intersection intervals known points latitudes and departures length and bearing line of sight longitude magnetic bearing magnetic declination measured Nautical Almanac objective lens observer obtained parallel of latitude photographs plane table plat plate Polaris pole distance position principal meridian protractor range line reference line right ascension rod intercept rod reading set-up point shown in Fig Sine slope stake stadia distance stadia rod star Subdivision survey Tang tangent telescope tion township corners transit is set usually vernier vertical angle vertical curve vertical distance