In this Dec. 28, 2012 photo, a sign marks a street name near a bakery in the Mare shantytown in Rio de Janeiro, Brazil. The city’s densest neighborhoods, its favelas, or shantytowns blanket entire hillsides, providing most of the city’s affordable housing. Now, those communities are being charted after decades of informality, each route and alley outlined and their names researched. Being left off the map had meant whole communities were unable to receive mail at home. It had also blocked people from giving required information on job applications, getting a bank account or telling the police or fire department where to go in an emergency call. (AP Photo/Silvia Izquierdo)

Associated Press
In this Dec. 28, 2012 photo, a sign marks a street name near a bakery in the Mare shantytown in Rio de Janeiro, Brazil. The city’s densest neighborhoods, its favelas, or shantytowns blanket entire hillsides, providing most of the city’s affordable housing. Now, those communities are being charted after decades of informality, each route and alley outlined and their names researched. Being left off the map had meant whole communities were unable to receive mail at home. It had also blocked people from giving required information on job applications, getting a bank account or telling the police or fire department where to go in an emergency call. (AP Photo/Silvia Izquierdo)
In this Dec. 28, 2012 photo, a sign marks a street name near a bakery in the Mare shantytown in Rio de Janeiro, Brazil. The city’s densest neighborhoods, its favelas, or shantytowns blanket entire hillsides, providing most of the city’s affordable housing. Now, those communities are being charted after decades of informality, each route and alley outlined and their names researched. Being left off the map had meant whole communities were unable to receive mail at home. It had also blocked people from giving required information on job applications, getting a bank account or telling the police or fire department where to go in an emergency call. (AP Photo/Silvia Izquierdo)
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