Height of the instrument (HI): Difference between revisions

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1. In surveying, the sum of the benchmark elevation and a rod reading at the benchmark, from which all subsequent readings are subtracted to establish elevations. The benchmark elevation may be established from older surveys, or may be arbitrarily assigned to provide a consistent basis for comparison.<br>
1. In surveying, the sum of the [[benchmark]] elevation and a rod reading at the benchmark, from which all subsequent readings are subtracted to establish elevations. The benchmark elevation may be established from older surveys, or may be arbitrarily assigned to provide a consistent basis for comparison.<br><br>
 
http://surveying.structural-analyser.com/_internal/images/Book_constrSurv_00159_642x450.jpg<br><br>
<br>
Assuming the height of the instrument is known, elevation is set by means of level instrument.<br>
Source: http://surveying.structural-analyser.com/chapter10/<br><br>

Latest revision as of 14:54, 5 October 2017


1. In surveying, the sum of the benchmark elevation and a rod reading at the benchmark, from which all subsequent readings are subtracted to establish elevations. The benchmark elevation may be established from older surveys, or may be arbitrarily assigned to provide a consistent basis for comparison.

Book_constrSurv_00159_642x450.jpg

Assuming the height of the instrument is known, elevation is set by means of level instrument.
Source: http://surveying.structural-analyser.com/chapter10/