Geographic Information System (GIS) mapping has become a popular and useful technique for identifying areas of need, as well as the health and social contributors to those needs. However the level of data and the usefulness of the resulting images can be a major concern. Using de-identified individual residence, COH creates neighborhood level maps and enables the identification of hot spots as opposed to the diffused image that results from somewhat limited data obtained by utilization of geo-political levels of data (state, county, city, zip code). The maps COH produces have the power to illustrate true geographies which show concentrations of concern. Analyses can then be used strategically to target resources and action, enhance grant funding proposals, and track change over time. Time-series analysis is important to program/project evaluation and increases the ability to identify trends over time.