Global Cyclone Mortality Risks and Distribution is a 2.5 by 2.5 minute
grid of global cyclone mortality risks. Gridded Population of the World
(GPW) Version 3 (beta) data provide a baseline estimation of population
per grid cell from which to estimate potential mortality loss. Mortality
loss estimates per hazard event are calculated using regional,
hazard-specific mortality records of the Emergency Events Database
(EM-DAT) that span the 20 years between 1981 and 2000. Data regarding
the frequency and distribution of cyclone hazard are obtained from the
Global Cyclone Hazard Frequency and Distribution dataset. In order to
more accurately reflect the confidence associated with the data and
procedures, the potential mortality estimate range is classified into
deciles, 10 classes of an approximately equal number of grid cells,
providing a relative estimate of cyclone-based mortality risks. The
dataset is a result of the collaboration among the Center for Hazards
and Risk Research (CHRR), International Bank for Reconstruction and
Development/The World Bank, and the Columbia University Center for
International Earth Science Information Network (CIESIN).