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This manual provides step-by-step instructions for implementing a methodology for calculating high resolution gridded-population and urban (built-up area) maps and statistics in GIS for overlay with the available maps of hazards (e.g. potential flood inundation maps) for estimating population exposure to hazards – one of the core components of disaster risk measurement. The methodology is implemented using freely available open source GIS software tools, in particular QGIS and related applications or plugins, most notably SAGA tools.

This manual developed by Jean-Louis Weber (Consultant) with Daniel Clarke (UNESCAP), Trevor Clifford (Consultant), and Gao Xian Peh (Consultant), with valuable feedback from the Disaster Management Agency of Indonesia (BNPB), the Dept. of Disaster Prevention and Mitigation (DDPM) of Thailand and the National Statistical Office (NSO) of Thailand.

Statistics Division +66 2288 1234 [email protected]