When King Charles III commissioned a map of South America and then banned it because it was too accurate

Carlos III commissioned Juan de la Cruz Cano y Olmedilla to create a highly detailed map of South America.

The map took more than a decade to complete and was initially celebrated for its accuracy.

Spain later suspended its printing and recalled copies because the precise borders and territorial details helped Portugal in colonial negotiations.

The map became a diplomatic problem, showing how cartographic accuracy could conflict with imperial interests.