As the ebola virus outbreak occurs for the first time ever in West Africa, Medecins Sans Frontieres have mobilised quickly to assist. However, the challenge of getting up to date maps that contained important information such as points of infection have hampered efforts - which is where the work of CartONG comes in. An NGO devoted to furthering the use of geographic information systems to provide analysis for emergency relief, CartONG has been invaluable in providing maps of Guinea. Remi Carrier of MSF and Sylvie de Laborderie of CartONG discusses this collaboration.