We are told that the Earth is a globe of 24,901 miles in circumference. This means we can work out how much curvature there will be in a given distance, using the formula for the Curvature of the Earth. https://www.omnicalculator.com/physics/earth-curvature
Did you know that when you are standing at an observer height of 6 feet, and you are looking towards an object that is 15 miles away, the amount of your view that should be hidden by the ‘curvature’ is over 90 feet?
To test this I went down to my local beach at Hornsea, multiple times over the last year, and stood right next to the sea in order to take 60 plus photographs of Flamborough Light House, which is nearly 15 miles away. The light house is 90 feet high and the light itself is 213 feet above mean sea level, which means the cliffs are about 120 feet high. Most of the cliffs/headland should therefore have been hidden by the ‘curvature’. NOTHING was hidden by the ‘curvature’ in any of my photos. Measurements are here – https://www.trinityhouse.co.uk/lighthouses-and-lightvessels/flamborough-head-lighthouse
I also took multple photos of the Grimsby Dock Tower from Fort Paull, over a distance of about 12 miles. NO curvature was found there either.
Here is the EXIF data for one of my photos which I took this year on my return to Hornsea beach to photograph Flamborough Light House again in May 2026 https://onlineexifviewer.com/share/7d06270a20bd7f2d and here is the photo:-
