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Originally Posted by manuit78
Now this is downright hilarious. How about doing a search and see how projections of a sphere onto a plane work?
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hehe, nice post, yeah.
to explain it in more detail to krb:
this mercator projection was invented actually for shipping navigation, because you can draw a straight line on these maps, then use your compass and sail all the way in this direction, you only have to check the angle once, when you start your trip.
today it isn't used for navigation anymore, because ships, and planes etc. sail, fly, ... on the shortest line, which isn't a straight line in this mercator projection. computers are callculating the angles for them all the time, and they have to change the them steadily during the trip. this would have been impossible before such computers were invented.
but still this isn't an out-of-date map, cause it still can be used for many things, because it preserves the angles in the projection from the shere to the plane, while the area preserving projections do not preserve the angles.
again: every map has it's advantages and disadvantages. otherwise you have to use a globe and not a map, but you can't put a globe in a book...