You can't make a precise map by looking at stars.
Maybe
you can't. That doesn't mean it can't be done.
You have to actually go places and make measurements.
So do it.
Instead of "trying" to raise $millions to map the whole world and then claiming the project is impossible because of the costs involved, start with an achievable goal, like buying (or borrowing) an antique surveyor's transit[nb]Using a purely-mechanical device like this avoids the "balck-box" aspects of computerized equipment, plus, it's cheaper! You can probably find a nice working one for a $few hundred, then you could sell it afterwards for most or all of what you paid for it (
lots more if you succeed!!), if you want, or put it on display in the museum celebrating your achievement![/nb], learning how to use it, and using it with some flat-earth-believing volunteers to carefully and accurately survey the perimeter of an area of maybe ten thousand square miles (a square 100 miles by 100 miles, say). That should be enough to distinguish between the spherical earth and your alternative flat one. The field work could probably be done over a summer if you do it in a place like one of the US plains states, where there's an extensive 1-mile grid of often lightly-traveled roads.
You guys whine away about how haaaarrrddd it is, but you won't even try. Why not? Is it because you wouldn't even begin to know how to do this? Is it because you know full well what the result would be? Is it because it's much easier (and more fun) to complain about being victimized than it is to get off your butts for something you claim to believe in. You do believe in the things you say, don't you?
What is so confusing about this to you?
Nothing, bro.
What
is confusing, though, is why, more than 150 years after Rowbotham and the beginning of the "modern" flat-earth movement, there's not a valid flat-earth map if the Earth really is flat. (Not really... I know the Earth isn't flat and that's why you have no valid flat-earth map, but you're the one stamping his feet and insisting it is, so the lack of a valid map is your problem.)
Remember,
you still have no map. An accurate and precise map of the flat earth, or even a significantly large area, if one were possible, would put this argument to rest. So stop whining and get cracking if making your point is
really what you're interested in doing! If sitting in front of a keyboard and whining about being lied to and persecuted is what you're interested in doing, then you're doing an OK job. I'd rate it about six out of ten; a lot of your stuff is merely tedious instead of being insightful and thought-provoking. Maybe that's the best you can do considering the material you have to work with.