© Brighteon.com All Rights Reserved. All content posted on this site is commentary or opinion and is protected under Free Speech. Brighteon is not responsible for comments and content uploaded by our users.
For every kilometer of distance, surveyors need to correct 6cm for curvature of the Earth. This is why there are no valid textbooks on surveying from flat-Earth theorists.
(Dave McKeegan https://www.youtube.com/watch?v=iXYPKfhCkRU )





