The flag and emblem of the United Nations is a map of the world in the azimuthal projection centered on the North Pole. Flat-Earthers wrongly claim that the UN uses the so-called “flat-Earth map” in their emblem and use it as “evidence” that the UN “knows Earth is flat.”
The Blue Marble is an image of Earth taken by the crew of the Apollo 17 spacecraft on its way to the Moon. It was taken from a distance of 29000 km from Earth’s surface.
Flat-Earthers dismiss it by incorrectly asserting that the image covers a too-small area of Earth’s surface, due to their failure to account for the maps’ distortion.