Answer one simple question. What method would you deem allowable for determining distances? If you cannot answer that, then we are indeed wasting our time here, because you cannot concede a single point made in this thread without conceding them all and giving a flat Earth zero possibility to exist based on distances alone.
Any method which does not use Round Earth longitude and latitudes or Round Earth assumptions will suffice.
http://www.icsm.gov.au/mapping/surveying2.html Surveying does not use Long/Lat for Triangulation and it uses simple trig to determine distances for mapping. An older map or road map would have used the method of laying known lengths of material down to measure the starting distance. If I can show a map from 1884 has the same distance information (within reasonable margin of error) as one done today, will you accept those distances? (US government offers maps from 1884 here but at the time of this post their system for retrieving older maps is down.)
From your link:
because the distance between the survey points is generally long (typically about 30 kilometres) the calculations also allow for the curvature of the Earth.
So you will disregard what you ask for simply because it mentions that the curvature of the earth is used in measurement. If that is the case you are asking for evidence that you will reject out of hand because it doesn't fit your preconceived notion. Catch 22 all. He asks for studies and proof, but he won't accept any studies or proof because they take reality into account. Any study on anything will be based in reality, and he prefers only studies that are based in fantasy. He asks for peer reviewed evidence and then rejects it because his peers with the same preconceived notion did not review it.
Will you accept this article from the institute for physics on the reliability of radar?
https://www.iop.org/publications/iop/2011/file_47456.pdfPerhaps this one?
https://ntl.bts.gov/lib/jpodocs/repts_te/14407.htm#_Toc119408980Probably not this one because it mentions that the curvature of the earth must be taken into account when using radar.
http://msi.nga.mil/MSISiteContent/StaticFiles/NAV_PUBS/RNM/310ch1.pdfPerhaps the fact the Air traffic control systems used RADAR which provides the location, orientation, and speed of the aircraft so that they can be properly brought to ground without continual crashes?
http://ethw.org/Air_Traffic_Control_and_RadarHow about the fact that the military uses radar in order to land aircraft in low visibility environments such as rain and fog?
https://www.army.mil/article/104352/Controllers_use_radar_to_direct_air_traffic/RADAR is accurate with over 95% reliability, it is measurable, and it is repeatable. You can even build a fully functioning and reliable radar from coffee cans.
Here are your articles and proofs. Reject them out of hand if you will, but don't say I didn't provide them.