Map Projection

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Advice For New Users

Map makers want to make maps that do three things (amongst others):

Unfortunately no map can simultaneous have all three so maps can only approximate the real geometry of a curved surface.

Map making, therefore, is a compromise so there are many different named projections.

Here are a few.

Mercator rhumb lines are represented by straight segments	Stereographic shape of circles are conserved
Hammer projection is an equal-area map projection	Conical Gnomonic projection displays all great circles as straight lines.