Thats all very nice, but as you admit, a crude map. Doesn't prove anything.
Here is an engineer land surveyor who testfies to the flat earth. They don't use the curvature in practice.

we should all understand what circular logic is. If the expert refers to the expert and back again with neither looking at the evidence infront of their eyes, then all the talk in the world means nothing.
There is no curvature, and the maths shows it.

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The moon is currently in the phase of waxing crescent, having just gone through the New Moon phase. The First Quarter phase is coming up in two days, Tuesday, at 7:48 pm in Los Angeles, just 11 minutes after the sun sets.
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This will be an ideal opportunity to measure the angle between the sun and moon at the First Quarter.
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When the sky is clear in the evening (like right now in L.A.) you can get a very good look at the moon, and you can readily see which direction the sun is shining from, since that portion of the moon illuminated by the sun is angled downward at about 40 degrees from the horizontal (the crescent's angle of repose), in the direction of where the sun just set.
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You measure this angle of repose by holding a straight edge up to the moon with the two points of the moon's crescent touching the straight edge, and then measure the angle from the horizontal. It measures 40 degrees by sight, without any optical instruments, with a margin of error of about 5 degrees plus or minus. If you use a simple optical instrument you can get that error down to less than one degree.
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It is most instructive to watch the moon right now because you can easily see (if you want to see, that is -- but most flat-earthers just don't want to see!) that the sun is moving DOWNWARD over the horizon, not horizontally as flat-earthers are wont to proclaim.
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The moon continues its aspect of pointing downward toward the distant sun while the moon is still visible in the sky, and after the sun has set. If the sun were to take a ridiculous right turn upon setting (as the flat-earthers imply with their silly nonsense videos taken out of context) the illuminated side of the moon would reveal that change of direction in the sun, and the crescent would lie at an increased angle as it arcs toward moon-set, approaching 90 degrees from the horizontal. BUT IT DOES NOT DO THAT. The moon, in fact does the precise OPPOSITE of what flat-earthers want it to do: its waxing crescent reclines increasingly every day more toward the horizontal instead of toward the vertical.
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The moon's crescent shows its angle of 40 degrees (approximately) at this time in the evening, and the angle decreases slightly as it moves over a 60-degree arc in the sky today. Tomorrow, it will move over a 75 degree arc, and Tuesday it will move over a 90 degree arc, increasing every day by about 15 degrees. (A few days ago at the New Moon, this angle was zero, since the sun and moon were in the same place in the sky.)
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When the moon sets today, I expect to see an angle of repose of about 35 degrees. Tomorrow, it will increase to 60 degrees in the evening, decreasing to 30 degrees at moon-set, and so on, each day until the First Quarter arrives on Tuesday evening. Tuesday evening, the moon will be high in the sky, at astronomical high noon when the sun sets. The quarter moon illuminated will show a straight line dividing the moon in half from top to bottom, with the line of division only very slightly angled downward, about 2 degrees. This goes to show the immense distance from the sun to the moon relative to the distance from the earth to the moon. It is not a proportion that is explained by anything less than many tens of thousands of times different. 
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As the moon arcs down to its setting position, the angle of repose will approach about 15 degrees, which will account for the declination of the sun's path around the earth, which this time of year is angled about 15 degrees from the vertical. When the summer solstice arrives, this angle of declination will be 11.5 degrees, for at high noon the sun will be directly overhead, as in Los Angeles we are at latitude 34 degrees, and the sun reaches 23.5 degrees north of the equator.
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Then the moon will remain a quarter moon as it arcs through those 90 degrees toward the eastern horizon. All the while, the illuminated side of the moon will angle downward more steeply from sunset to moon-set, further substantiating that the direction to the sun follows its course around and under the earth from our perspective on the earth's surface. That means the sun is shining on the moon from under our feet at a great distance from the earth, a distance measurable at many tens of thousands of times the distance from the earth to the moon.
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If it's proof you're looking for (you can prove that's the case by answering this question) then do tell, what is the surface area of the earth, in square miles, or square kilometers?
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If you claim that it cannot be known, then you fail, and you fall into the category defined by the ancient Greeks 2500 years ago:  a great heretic.
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Whattaya know. Looks like flat-earthers are all afraid to answer. (The question was, what is the surface area of the earth?)
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No shock there.
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Anyway,  the moon had a surprise for me today. I had expected to see it at astronomical high noon (moon time) with an angle of repose at 15 degrees from the vertical, or 75 degrees from the horizontal. But it was much less than that, about 3 or 4 degrees (87 or 86 from the horizontal). This by the way was with the sun nearly setting. Shortly after sunset, the angle of repose increased to 8 degrees from the vertical, which is 82 degrees from the horizontal.
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So the sun appearing to be very low in the sky at sunset is shining at the moon with a surprisingly high angle, so as to make the illuminated side of the moon appear to be spotlighted by a source much higher in the sky than the sun appeared to be. The reason the moon's angle of repose was so steep has to be that the sun's distance from the moon is so immense that the light shining on the moon seems to come from infinity. By the way, that's because of perspective, properly understood. You can learn a lot by watching the moon, but you have to WANT to learn. Flat-earthers apparently prefer to remain in their ignorance.
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Two hours later now, the moon's angle of repose has predictably reclined, as I thought it would, and has now further decreased to 30 degrees from the horizontal.  The moon is higher in the sky today than it was yesterday at this time, since it traverses the sky 15 degrees (+/-) less each day than the sun does. The sun moves faster than the moon, in other words. At the New Moon, the sun passes the moon by which is why eclipses always move from west to east. But that's over the heads of flat-earthers, isn't it? They don't know what causes eclipses because their flat-earthism cannot account for them, not now, not ever.
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We will be able to see the moon continue in its reclining aspect for another nearly 3 hours (2-3/4 hours), at which time we will be seeing a moon that has reached a reclining angle of about 15 degrees, if it goes as I expect it will. That means the sun will be shining on it from directly under our feet, at an immense distance away from the earth. If the earth were "flat" only the bottom of it would be getting sunlight after midnight our time. But since we know that in Asia and Australia it will be broad daylight at that time, we know that Asia and Australia are directly under our feet, on the other side of the globe of the earth.
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That further destroys the flat-earth nonsense, but flat-earthers are not short on platitudes to spout at times like this, such as "Nothing you say is true, and it doesn't prove anything." Yeah, right. 
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Tomorrow is your chance to measure the angle between the sun and moon as the moon approaches its first quarter.  That is, if you want to know the truth. Flat-earthers don't like to learn the truth, as they have shown time and again.
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Flat-earthers are making a real spectacle of themselves. 
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They can't manage to measure the area of anything, much less the surface of the earth.
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They can't be bothered to observe the fact of what the moon looks like at night, lest by measuring and thinking about it they might come to unanswerable challenges to their sacred cow dogma.
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When invited to look, listen and think, they run away scared.
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So it speaks for itself, what they do is what they are.
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All they have to offer is the same hackneyed nonsense, each point of which I have refuted with simple statements and observations, but in reply to each refutation (if they mention it at all) they return with a silly smiley or a platitude of incredulity, such as "the horizon always rises to the level of the observer" (which is patently false, and I have proved its falsehood for all to see, but the flat-earthers cannot refrain from denying the fact).
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But they selectively ignore the things that are most annoying to them, such as my most recent dozen posts on this thread, because they have no intelligent response.
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The moon is now in its gibbous crescent phase, during which time its angle of repose is dramatically steep in the early evening, at a negative 30 degrees from the vertical. Only past midnight does it reach zero degrees (which the Last Quarter moon had from the moment of sunset), and from there it gradually repeats the angles of repose that we saw before and after the First Quarter moon:  from 90 degrees receding sequentially to 45 and ultimately to 35 degrees as the moon sets in the east. 
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This, again, proves to us that the direction from which the sun is shining on the waning crescent moon in the early hours of the morning is identical to the direction from which the sun is shining on the waxing crescent moon in the late hours of night:  the sun shines on the moon at these times from directly below our feet and at a tremendously long distance, not from above the surface of the earth and a very nearby distance.
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Flat earthers run with terror from such observations and simple logic, because they're afraid of the truth.
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Simple.
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My, oh my.  So many words, so little said.  For those who are Catholic, the Church teaches that Jerusalem is in the middle of the world.  This is doctrine.  It is a teaching without dissent for or over a thousand years which makes it doctrine. Since it is impossible for Jerusalem to be in the center of the ball (in hell as it were) earth is not a globe.

Every argument here against flat earth is riddled with conjecture, misrepresentation, confusion and a consistently unscientific approach nearly every time, the most common being,  "...How can this (insert long drawn out diatribe that fills the page) be possible?"  Then draw a conclusion from thin air:  "So therefore, earth is not flat." 

Just because someone has no answers to their twisted notions doesn't mean the answers aren't available, provable, logical and true.  Earth is not a globe.  Catholic teaching.  Scientific fact.  Obvious reality.  

Prove Jerusalem is inside the center of a ball earth and flat earth will go away.  

Tick Tock....   

 Matthew 4:8
Again the devil took him up into a very high mountain, and shewed him all the kingdoms of the world, and the glory of them,

Matthew 24:30
And then shall appear the sign of the Son of man in heaven: and then shall all tribes of the earth mourn: and they shall see the Son of man coming in the clouds of heaven with much power and majesty.

By the way, 

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I'm still waiting for any flat-earther to produce their measurement of the angle between the sun and moon at the hour of first or last quarter moon. 
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This is not "conjecture" or "misrepresentation" or "confusion and a consistently unscientific approach," but rather it is objective fact, which flat-earthers run from like the plague. 
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And they do so, complaining all the way!!
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