"Using the Geographic Information System (GIS)-based methodology developed by Hansen and Bausch in 2006, a Hazus Haiti study region was developed in the immediate weeks following the devastating January 12, 2010 earthquake. Before the earthquake, Haiti lacked adequate GIS datasets to support detailed loss estimation. But with the combined efforts of the GIS and earthquake research communities, Haiti rapidly became a data rich environment. Enhancement of the original methodology for Haiti included the development of grid sizes of 10 km, and 1 km that represent rural and urban environments. 'Shantytown' areas with their unique building stock, and very high population densities, were also defined using pre-event data from the United Nations. A new treatment for 'urban' or high population density grids (1 km) where the team assigns the majority of non-residential building occupancy types was developed for Haiti. After setting up the study region, calibration runs were performed by comparing modeled and observed losses of the earthquake, and iteratively adjusting building distribution schemes, as well as the Hazus casualty analysis parameters. The USGS developed additional ShakeMap scenarios representing credible earthquakes based on those that destroyed Port-au-Prince at least twice in the 1700's. These were formatted for use in the Hazus Haiti study region and allowed the assessment of potential alternative futures for Haiti based on proposed seismic design levels and credible future earthquake scenarios."
United States Federal Emergency Management Agency: http://www.fema.gov