Journal of
Faculty of Civil Engineering


FACULTY JOURNALS
SCIENTIFIC MEETINGS
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CONFERENCE PROCEEDINGS
6th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2018 , 2018.y., pp. 745-753


HISTORICAL REVIEW OF PRECISE LENGTH MEASUREMENTS
 
DOI: 10.14415/konferencijaGFS2018.073
UDC: 528.021:528.51
CC-BY-SA 4.0 license
Author : Delčev, Siniša; Ogrizović, Vukan; Gučević, Jelena; Miljković, Stefan
 
 Summary:
 Precise measurement of long distances for scale determination, especially in 1st order trigonometric networks, was a problem for years. Thanks to Snellius and his work, a shorter distance on a flat field could be measured, and then its scale could be transferred by angle measurements to a distance between two 1st order trigonometric points. However, even measuring those short distances could not be measured with high accuracy. Lengths were measured by wooden or metal levers, until the invention of invar, which allowed precise distance measurements. Furthermore, electro-optical and, later, laser distance meters, involved direct precise measurements of long distances.
 
 Keywords:
 invar wires, Jäderin basis apparatus, distance meter, pulse, phase, frequency