# Equal-area projection

## Type of map projection / From Wikipedia, the free encyclopedia

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In cartography, an **equal-area projection** is a map projection that preserves area measure, generally distorting shapes in order to do that. Equal-area maps are also called **equivalent** or **authalic**. An equal-area map projection cannot be conformal, nor can a conformal map projection be equal-area.

Several equivalent projections were developed in an attempt to minimize the distortion of countries and continents of planet Earth, keeping the area constant. Equivalent projections are widely used for thematic maps showing scenario distribution such as population, farmland distribution, forested areas, etc.