A map has no vocabulary, no lexicon of precise meanings. It communicates in lines, hues, tones, coded symbols, and empty spaces, much like music. Nor does a map have its own voice. It is many-tongued, a chorus reciting centuries of accumulated knowledge in echoed chants. A map provides no answers. It only suggests where to look: Discover this, reexamine that, put one thing in relation to another, orient yourself, begin here… Sometimes a map speaks in terms of physical geography, but just as often it muses on the jagged terrain of the heart, the distant vistas of memory, or the fantastic landscapes of dreams.
― Miles Harvey, The Island of Lost Maps: A True Story of Cartographic Crime