Having or relating to equal volumes; referring to a projection or mapping that preserves volume relationships.
From Latin 'equi-' (equal) combined with 'voluminal' (relating to volume, from Latin 'volumen'). This is a technical term used primarily in mathematics, geology, and cartography.
Cartographers use equivoluminal projections to make maps that don't lie about the size of continents—most maps we see are actually distorted, making Europe and North America look bigger than they really are!
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