“All things are metaphors”*…
For much of the 17th century, Europeans believed that California was an island. Indeed, readers who have suffered through your correspondent’s explanation of scenario planning know that a 17th century map in which California is depicted as an island, very like the one above, figures into the talk as an example of the way that incorrect maps– cartographical or mental maps– are hard to change and often lead us astray.
But as this appreciation of Stanford’s collection of California maps points out, there may be a deeper truth to the depiction:
The fact that a number of explorers knew that California was not an island was not enough to nip the idea in the bud. Yet it would be a shame to think of the idea as simply an error, a cartographical crease which needed ironing out. Even though maps may be presented as accurate, they cannot escape their metaphorical nature. They reflect much more than physical geography. That California was mapped as an island for so long speaks to its separateness. The writer Rebecca Solnit, a student of the Stanford maps, has argued that, “An island is anything surrounded by difference.” The state contains around 2,000 plant species found nowhere else. Its borders comprise dizzying mountains, harsh deserts and immense ocean. It has been home to the Gold Rush, the psychedelic era, the silicon boom. In several ways then, California is an island…
More (and more marvelous maps) at “Maps Showing California as an Island.”
* Johann Wolfgang von Goethe
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As we remember that “the map is not the territory,” we might recall that it was on this date in 1570 that Gilles Coppens de Diest at Antwerp published Flemish cartographer Abraham Ortelius’ Theatrum Orbis Terrarum— a collection of 53 maps that is generally agreed to have been the first modern atlas.
Interestingly (for reasons explained in the article linked above), Ortelius’ maps, which pre-date the charts in the Stanford collection, portray California more accurately.

Title page from a 1606 edition