Which geographic product design innovation was famously created after its designer got lost in the London Underground and decided there was a need for greater clarity over geographic accuracy?

Product design in geography has evolved dramatically over centuries, with certain innovations standing out as game-changers in how we navigate and understand our world. Beyond basic cartography, the integration of user experience principles into geographic tools has revolutionized how people interact with spatial information. This trivia question focuses on a pivotal product design breakthrough that transformed geographic information accessibility for millions of users worldwide.

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Harry Beck's London Tube Map (1933), which prioritized clarity and usability over geographic precision
Marie Tharp's Ocean Floor Maps (1950s), which visualized underwater topography for the first time
The Peters Projection (1974), which accurately represented land area proportions unlike the Mercator projection
Google Earth's interface (2001), which revolutionized 3D geographic visualization for everyday users