Skip to main content
Fig. 3 | Geoenvironmental Disasters

Fig. 3

From: A method for evaluating population and infrastructure exposed to natural hazards: tests and results for two recent Tonga tsunamis

Fig. 3

Methodology describing the implementation of a low-cost toolbox for disaster vulnerability mapping. Components of the seven steps are displayed in the right panels. a Steps 3, 4 and 5 use the buildings inventory to define built-up areas. b Steps 2, 4 and 6 use the population inventory to define populated areas. c Steps 1 and 7 use an operational definition of the coastal belt to outline coastal populated areas. d Step 8 uses damage inventory to discuss the model quality. Green dots: buildings (OCHA 2022c). Yellow dots: buildings damaged by the tsunami in 2022 (CEMS 2022; USGS HDDS 2022). Black crosses: churches (churches are the only non-residential buildings described in the existing GIS layer: fire stations, police stations, schools and other public buildings are absent, thereby emphasizing the lacunar character of the information available)

Back to article page