This document discusses how community mapping in rural Tanzania is helping to achieve the UN's Sustainable Development Goals. Local organizations trained "Digital Champions" in villages to map locations like safe houses and report incidents of gender-based violence using smartphone apps. Remote volunteers also contribute to base maps using satellite imagery. The mapping helps activists and police quickly find and protect at-risk girls. Digital Champions also surveyed village services and priorities. Ongoing monitoring will track progress on priorities like healthcare access and clean water.