Many maps of Rio de Janeiro have excluded the city's shantytowns, known as favelas, causing a number of problems for residents. Among other difficulties, they have had a hard time completing job applications or directing emergency personnel. Now, however, efforts are under way to put these neighborhoods on the map. "For a community to be left off of the map is the equivalent of saying that the community doesn't matter," said University of Maryland assistant professor Jason Farman.

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