shanghaishift[Image: The same point in Shanghai, shifted between its map and satellite view; via Google Maps].

The slippage between map and territory is made unsettlingly clear by a mandatory geographic offset introduced into digital cartography products operating in China.

Variously known as “_applyChinaLocationShift,” eviltransform, the “China GPS Offset Problem,” and, most interestingly, as “Mars Coordinates,” this algorithmic shifting of GPS coordinates is related to China’s official mapping and survey rules, devised for national and economic security.

I’ve written much more about this in a new article for Travel + Leisure, where everything from trap streets to Jorge Luis Borges gets involved, as well as questions of technology, international borders, and geopolitics. Check it out, and let me know if you’ve had any experience with the issue yourself.

(Thanks to @0xdeadbabe for the tip!)