Access to appropriate and timely health care services is an important component of achieving health for children and critical in reducing morbidity and mortality. The increasing availability of data, informatics and ubiquity of computing in health care has allowed for the development of new tools and applications to study access and utilization of health care services. Geographic information systems (GIS) has the advantage of allowing the exploration and study of spatial relationships and health outcomes, health care services, and populations. Access to appropriate and timely health care services is an important component of achieving health for children and critical in reducing morbidity and mortality. The increasing availability of data, informatics and ubiquity of computing in health care has allowed for the development of new tools and applications to study access and utilization of health care services. Geographic information systems (GIS) has the advantage of allowing the exploration and study of spatial relationships and health outcomes, health care services, and populations.