VOICED: Re-mapping the favelas

Raphael, a dedicated student from Dona Marta, is part of a group using GPS-equipped cellphones to map their shantytown. Their work is shared on Wiki Mapa, an online platform that allows users to add local information globally. The project aims to create a comprehensive map of Rio's shantytowns, with the most active participant winning a journalism scholarship. Despite three months of effort, many areas remain unmapped, highlighting the ongoing challenges and potential for future work.

What reward is offered to the wiki reporter who maps the most sites?

What challenges do the students face in their mapping project?