We've been doing that for centuries: it's called surveying, and more generally topography.
And to be able to fit together everyone's measurements, we came up with the World Geodetic System.
Exactly, and don't you find it odd that despite our incredible modern ability to circumnavigate land, carry out surveillance, and topological analysis, FET still doesn't have a map that correlates with land mass shapes, sizes and distances that we know to be true in reality? There are many maps proposed, none of which fit, but the one that seems to be the most widely accepted thus far is the standard "Azimuthal Polar Projection" of our accepted globe. I'd be interested to know if the flat Earth community have faith in this map, or just use it because there is nothing else better.
I mean, it's really simple to dismiss. On the globe Earth we know approximate distances between places. Very roughly, because that's all it needs to be:
Australia to South America is approximately 10,000 miles
Australia to South Africa is approximately 6,500 miles
If you take the Azimuthal Polar Projection map, the shortest straight line distance between the same two places is very roughly as follows:
Australia to South America ends up being approximately 15,000 miles (5000 miles further than is measured on Earth)
Australia to South Africa ends up being approximately 12,500 miles (6000 miles further than is measured on Earth)
Taking into account all places and all known distances, it's literally impossible to map those onto a flat circle and maintain those same distances and proportions. In order to support FET, either the shape and position of the land masses is incorrect, or the distances we are being told are incorrect/lies, none of which have been proven, so like NASA it comes down to things being a conspiracy. Again, I'd have thought that if the Earth was indeed flat, and we can literally just sail around and measure these things quite easily, why hasn't anybody made an attempt to show the shape and position of the land masses to support a flat Earth map that also explains why we measure the distances that we do?
Antarctica is a whole other thing.