|
a b c d e f g h i j k l m n o p q r s t u v w x y z search |
TeachMeFinance.com - explain Backsight Backsight --
In hydrologic terms, a rod reading taken on a point of known elevation, a benchmark or a turning point. Backsights are added to the known elevation to arrive at the height of the instrument. With a known height of the instrument, the telescope can be used to determine the elevation of other points in the vicinity.
|