The Africa viewer is an effort to contribute to world-wide availability of relevant information and knowledge on groundwater resources. The BGS maps are the results of maps developed by the British Geological Survey with University College London (UCL), to quantify the groundwater resources of Africa. These are the first quantitative continent-wide maps which give an introduction to how groundwater resources vary across Africa; their resilience to climate change; and the potential for groundwater to be used in adaptation strategies to climate and other environmental changes. The SADC Hydrogeological Atlas was developed as part of the Regional Groundwater Management Programme in the Regional Strategic Action Plan for Integrated Water Resources Development and Management (RSAP-IWRM). The map is intended to provide information of hydrogeological characteristics for the SADC region, focusing on the extent and geometry of regional aquifer systems.