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Ag mechanics unit 13

surveying terms

TermDefinition
a rod reading taken on a point of known elevation Back Sight (BS)
a permanent point of known or assumed elevation from which a survey started Benchmark (BM)
a unit of measurement which equals 66 feet Chain
a line connecting points on the land surface which have the same elevation Contour line
the process of determining the releative elevations of various points; determining elevation differences between points Differential leveling
a rod reading taking place on a point of unknown elevation Foresight
a satellite-based navigation system Global Positioning System (GPS)
the elevation of the level line of sight of the crosshairs in the instrument with respect to the benchmark Height of instrument
a temporary point for a transit while doing differential leveling Turning point
Created by: rhorn