How to Calculate Reduced Level given Height of Instrument?
Reduced Level given Height of Instrument calculator uses Reduced Level = Height of Instrument-Back Sight to calculate the Reduced Level, The Reduced Level given Height of Instrument is defined as the vertical distance between a survey point and the adopted level datum. A bench mark (BM) is the term given to a definite, permanent accessible point of known height above a datum to which the height of other points can be referred. Reduced Level is denoted by RL symbol.
How to calculate Reduced Level given Height of Instrument using this online calculator? To use this online calculator for Reduced Level given Height of Instrument, enter Height of Instrument (HI) & Back Sight (BS) and hit the calculate button. Here is how the Reduced Level given Height of Instrument calculation can be explained with given input values -> 45 = 65-20.