Crowds create Wikipedia-style maps of the world

When Benjamin Gleitzman moved from New York to the San Francisco Bay area, he used a talking turn-by-turn driving app to guide him across the country. In the middle of Wyoming, the voice told him to turn left where there ...

Rio youth use GPS phones to put favelas on map

Rio's favelas are home to a third of the city's population, but are almost invisible on maps -- a situation five young women are trying to change with the help of GPS and the Internet.

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