Which map projection preserves the accurate shapes of landmasses but distorts their relative sizes, particularly near the poles?

Question

Accepted Answer

Mercator projection. The Mercator projection, developed by Gerardus Mercator in 1569, is a cylindrical conformal projection that preserves accurate shapes and angles of landmasses. This property makes it extremely useful for navigation because a straight line on a Mercator map represents a constant compass bearing. However, the projection increasingly distorts the size of regions as they approach the poles, making Greenland appear comparable in size to Africa when Africa is actually about 14 times larger.

The Robinson projection is a compromise projection that attempts to balance distortions of shape, area, and distance rather than preserving any single property perfectly. The Peters projection (also called the Gall-Peters projection) is an equal-area projection that preserves the relative sizes of landmasses but significantly distorts their shapes, stretching regions near the equator vertically. The azimuthal equidistant projection preserves accurate distances from the center point of the map but distorts both shape and area away from the center.

Cartography and map projections are core topics in geography because every flat map must make trade-offs when representing a spherical Earth. The DSST exam expects students to understand the key properties each projection preserves and sacrifices. Recognizing that no single projection can perfectly represent all spatial relationships is essential for critically evaluating geographic data and choosing appropriate maps for specific purposes.

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