Food Security

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Recommended Citation(s)*:

Center for International Earth Science Information Network - CIESIN - Columbia University. 2020. Food Insecurity Hotspots Data Set. Palisades, New York: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/cx02-2587. Accessed DAY MONTH YEAR.

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The original FEWS NET data were filtered to maintain only areas representing a phase of food insecurity; areas of water, parks, forests, and reserves were removed. Thus, the final attribute values were integrated phase classifications (IPC) ranging from 1 to 5, with 1: Minimal, 2: Stressed, 3: Crisis, 4: Emergency, and 5: Famine. The original shapefiles and grid versions of the quarterly (or trimesterly) reports are provided as inputs. The data layers were combined to calculate the frequency of each IPC class (one layer for each class) as well as the duration. The duration grids report, for each IPC class separately, the longest consecutive duration in terms of number of reporting periods over the 10-year period. In other words, if the maximum duration of Phase 2 (Stressed) lasted for 16 consecutive reporting periods, then the grid value for that IPC class and location will report 16. Similarly, if Phase 3 (Crisis) lasted for 7 consecutive reporting periods, then the value of the grid cell is 7. Finally, the statistics grids provide the average and standard deviation of quarterly/trimesterly IPC reported classes over the 10 years.

The Food Insecurity Hotspots Data Set consists of global grids in GeoTIFF (.tif) format and vector feature classes in Shapefile (.shp) format. The input data were originally produced by FEWS NET in Geographic projection. We reprojected the data and offer them here in Mollweide projection as well for processing. Users should be aware that some spatial uncertainty is introduced in the reprojection process.