"I believe in a round earth."
You must, there certainly is no evidence from earth's physical condition that supports the idea.
Really? YOU claim "there certainly is no evidence from earth's physical condition that supports the idea".
Well, I believe the earth is a Globe, you, I assume, think that the earth is round - a round disk.
And there is mountains of evidence for the earth's being a Globe!
Even the old English monk, the Venerable Bede was careful to make that distinction!
Here is what Bede said about the shape of the earth—round “like a ball” not “like a shield”:
“We call the earth a globe, not as if the shape of a sphere were expressed in the diversity of plains and mountains, but because, if all things are included in the outline, the earth’s circumference will represent the figure of a perfect globe. … For truly it is an orb placed in the centre of the universe; in its width it is like a circle, and not circular like a shield but rather like a ball, and it extends from its centre with perfect roundness on all sides.”
From Creation.com, The flat earth myth (http://creation.com/flat-earth-myth)
And there is lots of evidence for the earth's being a Globe!!
- Buildings disappear!
(https://upload.wikimedia.org/wikipedia/commons/3/33/Toronto_seen_across_lake_Ontario_from_Olcott_2.JPG)
Toronto as seen across lake Ontario from Olcott Beach, NY; evening 18th July EST, by Ad Meskens
Now those buildings are roughly 50 m wide so their "vanishing point" would be 50 x 3,000 m or 150 km.
They are 64.5 km away and not far enough away to disappear according yo your "magical perspective".
There they are sitting up like Jackie 64.5 km away with a large part hidden by about 82 m of bulge.
The view here is helped by a zoom lens, which has not magically restored the hidden part.
And many many, more where thay come from.
Ships get partly hidden behind the horizon.
]
Ship partly below horizon, Mathias Kp
Towers get partly hidden behind the horizon:
Turning Torso (190m tall) - seen from 25km - 50km
More towers:
FLAT EARTH - EXPERIMENT - TELESCOPE, Alex Chertnik
You do not have to rely on those videos. Go out and check it yourself, a telescope helps.
- The horizon over the ocean is sharp and clear - impossible of a flat earth, see
(http://i1075.photobucket.com/albums/w433/RabDownunder/Horizon/Sharp%20Horizon%20from%20near%20Sea%20Level%20-%20at%20Shorncliffe_zpsbhzco08y.jpg)
Sharp Horizon from near Sea Level - at Shorncliffe
To me, this proves that the horizon is comparatively close.
- The angular size of the sun (and the moon) do not change size as the appear to move from rising near the east to setting near the west.
I did not take these photos. There were taken be an "avid flat-earther" and posted on YouTube.
And the statement "the sun does not appear to change it size until just before sunset" is his, not mine
(http://i1075.photobucket.com/albums/w433/RabDownunder/Sun%20Size/20160711%20-%20Sun%20%2009.30%2048xZoom_zpscotyaspw.jpg) | | (http://i1075.photobucket.com/albums/w433/RabDownunder/Sun%20Size/20160711%20-%20Sun%2012.00%2048xZoom_zpsb3rppgyf.jpg) | | (http://i1075.photobucket.com/albums/w433/RabDownunder/Sun%20Size/20160711%20-%20Sun%2015.00%2048xZoom_zpsgk51nozr.jpg) | | (http://i1075.photobucket.com/albums/w433/RabDownunder/Sun%20Size/20160711%20-%20Sun%2017.00%2048xZoom_zps3wayd4qo.jpg) | | (http://i1075.photobucket.com/albums/w433/RabDownunder/Sun%20Size/20160711%20-%20Sun%2019.00%2048xZoom_zpsewsphkoz.jpg) | |
The "sun does not appear to change it size until just before sunset" - and then only a little in height!
- The sun rises from behind the horizon and sets behind the horizon like this!
(http://i1075.photobucket.com/albums/w433/RabDownunder/08-Weipa%20Sunset_zpstd6ncc8x.jpg) | | (http://i1075.photobucket.com/albums/w433/RabDownunder/13-Weipa%20Sunset_zpsvl5otrfj.jpg) |
Yes, you've seen it all before, and you'll say it's all due to your "magic perspective" or "impossible refraction".
All I can say to that is: Show some evidence that perspective and/or refraction can explain all that!
Just what sort of evidence do you need?
Just open your eyes and look about you, there is plenty of evidence for a Globe Earth!