Global Volcano Total Economic Loss Risk Deciles is a 2.5 by 2.5
minute grid of global volcano total economic loss risks. First,
subnational distributions of GDP are computed using a two-fold
process. Where applicable, the proportional contribution of
subnational units are determined following the methodology of Sachs
et al. (2003), and these proportions are used against World Bank
Devleopment Indicators to determine a GDP value for the subnational
unit. Once a national GDP has been spatially stratified into the
smallest adminstrative units available, it is further distributed
based upon Gridded Population of the World Version 3.0 (beta)
population distributions. A per capita contribution value is
determined for each unit, and this value is multiplied by the
population per grid cell. Once the GDP has been determined on a per
grid cell basis, then the spatially variable loss rate as derived
from EM-DAT historical records is used to determine the total
economic loss posed to a grid cell by volcano hazards. The final
surface does not present absolute values of total economic loss, but
rather a relative decile (1-10) ranking of grid cells based upon the
calculated economic loss 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).