Global Cyclone Hazard Frequency and Distribution is a 2.5 by 2.5 minute
grid based on more than 1,600 storm tracks for the period 1 January 1980
through 31 December 2000 for the Atlantic, Pacific, and Indian Oceans
that were assembled and modeled at UNEP/GRID-Geneva PreView. Windspeeds
around storm tracks were modeled using Holland's model (1997) to assess
the grid cells likely to have been exposed to high wind levels.
Post-modeling, the cells were divided into deciles, 10 classes
consisting of approximately equal number of grid cells. The higher the
value of the grid cell, the higher the decile ranking and the greater
the frequency of the hazard relative to other cells. The dataset is the
result of collaboration among the Center for Hazards and Risk Research
(CHRR), International Bank for Reconstruction and Development/The World
Bank, United Nations Environment Programme Global Resource Information
Database Geneva (UNEP/GRID-Geneva), and the Columbia University Center
for International Earth Science Information Network (CIESIN).