29 Mercator projections, named after the Dutch mapmaker Gerardus Mercator (1512-1594), offer the best compromise. To understand how a Mercator map is created, imagine a piece of paper wrapped around a globe at its equator. Imaginary lines from the center of the globe pass through the surface and onto the paper. As you can see from the illustration, these lines spread far apart before they reach the paper, and this creates distortions in the sizes of land formations, particularly near the poles. On a Mercator projection map, Greenland appears roughly the size of South America, when it is actually only one-fifth its size. But because a Mercator projection has perfectly straight lines of longitude and latitude, it's as accurate as a gnonomic projection for dis-tances, and improves upon the direction-finding advantages of polyconic projections. r ^ G-,r 1 ) ) l ^ 1 V " V-$ S % I ^ V. Mercator-Projection Map
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This note was uploaded on 09/26/2011 for the course MATH 456 taught by Professor 1234 during the Spring '11 term at Huntingdon.