Leveraging community health worker system to map a mountainous rural district in low resource setting: a low-cost approach to expand use of geographic information systems for public health.

Geographic Information Systems (GIS) have become an important tool in monitoring and improving health services, particularly at local levels.

However, GIS data are often unavailable in rural settings and village-level mapping is resource-intensive.

This study describes the use of community health workers’ (CHW) supervisors to map villages in a mountainous rural district of Northern Rwanda and subsequent use of these data to map village-level variability in safe water availability.