GlobalVoices has a post on a guide to crowdsourcing in Latin America:
. . . [C]rowdsourcing has become a popular method of citizen participation in compliance with the law, public health, consumer rights, and social issues in Latin America, one of the regions with the largest growth of Internet penetration in the world . . .
The post has a list of crowd-sourcing projects in the region, most of them map crime and violence. This is an example of Mexico City.