Levelling refraction
id:
levelling-refraction-290-11316839
title:
Levelling refraction
text:
Levelling refraction refers to the systematic refraction effect distorting the results of line levelling over the Earth's surface. In line levelling, short segments of a line are levelled by taking readings through a level from two staffs, one fore and one behind. By chaining together the height differences of these segments, one can compute the total height difference between the end points of a line. The classical work on levelling refraction is that of TJ Kukkamäki in 1938–39. His analysis is
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Levelling_refraction
date created:
date modified:
2023-03-14T00:11:48Z
main entity:
{"identifier":"Q6535119","url":"https://www.wikidata.org/entity/Q6535119"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/d/df/Kukkamaki.png","width":687,"height":380}
fields total:
13
integrity:
14