Following the clear success of the airline route map project - which clearly demonstrates that there can be no possible flat earth map that can explain how long it takes people to fly between cities in commercial airliners - I have another idea for a proof of RET.
Here is a VERY interesting project:
http://confluence.orgThe idea is to have people to travel the world and use their GPS units to take them to "confluence points" (defined as: "locations that are at exact whole-degree latitude/longitude coordinates"...like 13N, 45E...but not 13.234N 44.9876E).
When those people get there, they take photos of the area, a photo of their GPS unit - and they typically write up the story of how they got there - who went with them to verify it, the exact time and date, etc.
Predictably, not many people are interested in travelling to weird places in the middle of the ocean - or into vast areas of Siberia, the Arctic and Antarctic - just to get a photo for this website...but there is amazingly good coverage for most parts of the world.
Even so, there are lots of photos of from many of the confluence points in those areas. Notably NOT from people who had tremendous problems with scaling the Ice Wall, fighting off UN gunships, running out of air or being chilled to absolute zero - because you'd think they'd mention that in their visit reports!
So right there - we can probably discount the FE map on the Wiki. (*WHY* is that still there?)
Of the 6,839 confluence points on Earth that are either on land, or within sight of land - they have photographs and visit reports for 6,459 of them. Places like Europe, North America and Australia have near 100% coverage. Each report lists the people who were present to witness the event, the time, the date, etc. Many of them leave email addresses and are interested to talk about their findings.
I'm fairly sure we can use this database of pictures as additional proof of the round earth...but I'm still working through the "chain of proof" part - so some patience will be needed here. We want to be very careful to get it right.
But if anyone else has any thoughts on the usefulness of this enormous body of evidence, it would be interesting to hear it.
Obviously, the locations were found by map and verified by GPS - so our Flat Earth friends here will want to start off by proving that these people were not standing where they claimed to be when they took the photos.
This should be a simple matter to demonstrate. Find a confluence point that's in a town or village - or at some road intersection. Find a map that provides the lat-long of this place from an era before GPS existed (circa 1972) - go to confluence.org and we'll see whether their GPS got them to the correct location.
Seem like a plan?
Do this for enough places and our FE community will be forced to concede that GPS is indeed reasonably accurate....or maybe not...maybe the Earth is flat and GPS's are horribly inaccurate. We'll see!