“A system of electronic mapping which allows many different types of data to be layered onto a single image is being used to improve healthcare across Rwanda.
The digital maps, called Geographic Information Systems (GIS), are designed to compile information from numerous databases and use it to both track and predict outbreaks of disease.
This can then be used to help developing countries best utilise their limited resources. For example, GIS is used to organise data on clusters of disease and the availability of drinking water.”
See also, data mapping, point maps, John Snow, cholera, London 1854