SA pioneered the use of Geographic Information System (GIS) technology & Google Earth for poverty mapping in the late 90’s. We create granular spatial data by mapping settlement patterns and infrastructure in and around each target slum. This spatial data is supplemented with survey data collected at the household level and analyzed to identify the most vulnerable population and plan targeted interventions. The data is finally validated by the Municipalities we work with to add legitimacy to it and sharing this data in the public domain amplifies its utility. Granular spatial data helps us to leverage the power of geo-visualization for effective tracking and monitoring.