এডওয়ার্ড রাইট: সংশোধিত সংস্করণের মধ্যে পার্থক্য

▲<ref>Parsons & Morris, p. 63; see also {{citation|author=Marie Boas Hall|chapter=The Uses of Mathematics &#91;ch. 7&#93;|chapter-url=https://books.google.com/?id=TnW2YIrn2pEC&pg=PA208&lpg=PA208|title=The Scientific Renaissance 1450–1630|location=New York, N.Y.; London|publisher=[[Dover Publications]]; [[Constable & Robinson|Constable]]|year=1994|pages=197–237 at 208|isbn=0-486-28115-9|author-link=Marie Boas Hall}}</ref> The sphere is expanded uniformly, so that the [[meridian (geography)|meridians]] lengthen in the same proportion as the [[circle of latitude|parallels]], until each point of the expanding spherical surface comes into contact with the inside of the cylinder. This process [[conformal map|preserves the local shape and angles]] of features on the surface of the original globe, at the expense of parts of the globe with different latitudes becoming expanded by different amounts.<ref>It is a common misconception that the Mercator projection is mathematically the same as projecting rays of light through the globe onto the cylinder from a source at the centre: {{citation|author=Eli Maor |chapter=A Mapmaker's Paradise &#91;ch. 13&#93; |chapter-url=http://press.princeton.edu/books/maor/chapter_13.pdf |title=Trigonometric Delights |location=Princeton, N.J.; Chichester |publisher=[[Princeton University Press]] |year=1998 |page=165 at 176 |isbn=0-691-05754-0 |deadurl=yes |archiveurl=https://web.archive.org/web/20080511232254/http://press.princeton.edu/books/maor/chapter_13.pdf |archivedate=11 May 2008 |df=dmy }}</ref> The cylinder is then opened out into a two-dimensional [[rectangle]]. The projection is a boon to navigators as [[rhumb line]]s are depicted as straight lines.]]