The geometry problem
Imagine peeling an orange and trying to press the peel perfectly flat without tearing or stretching it. The same basic problem appears when cartographers project Earth’s curved surface onto a rectangle. Something has to distort. Different projections choose different properties to preserve.
Why Mercator looks familiar
The Mercator projection became influential because it preserves local angles, which made compass bearings useful for navigation. Its famous drawback is area inflation toward the poles. Greenland therefore looks far larger relative to Africa than it truly is. The map is doing what it was designed to do; it is simply not an equal-area comparison.
Equal-area maps make different sacrifices
Equal-area projections preserve relative surface area, making them useful when comparing the physical size of countries or regions. Shapes may look less familiar because preserving area forces distortion somewhere else. There is no projection that can simultaneously preserve every desirable property across the whole world.
Why this matters in a geography game
Country outlines can look subtly different depending on projection and how a dataset scales them. A learner should recognize the underlying geography rather than expecting every map to match one classroom poster. Understanding projection also prevents false intuitions about the relative size of northern and equatorial countries.
Use more than one map
A useful geographic habit is to switch representations. Use a globe for overall spatial relationships, an equal-area map for size, a navigation-oriented projection for direction, and regional maps when detail matters. No single map is the truth; each is a tool built for a purpose.