The Most Accurate Flat Map of Earth Yet
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We then had to find the best formula for plotting the features on each side, one that would minimize the Goldberg-Gott error score. The answer is one in which the North Pole appears at the center of the north side of the phonograph record, with longitude lines spreading out equally from it where the scale on each longitude line is uniform, and similarly for the south side. Distances between cities are measured by simply stretching a string between them; if they are in opposite hemispheres, the string simply stretches across the equator at the edge of the map.
A disadvantage of the new map is that you can’t see all of the Earth’s surface at once, but remember this is true for the globe as well.