The methods behind the development of the Global Population Projection Grids Based on SSPs, v1 (2010 – 2100) can be found in the following open access journal article:
Jones, B., and B. C. O’Neill. 2016. Spatially explicit global population scenarios consistent with the Shared Socioeconomic Pathways. Environmental Research Letters, 11 (2016): 084003. https://doi.org/10.1088/1748-9326/11/8/084003
We provide here the article and its supplementary material (5MB PDF file).
The spatial population projections were conducted on a country-by-country basis using future scenarios of population growth and urbanization that were developed as part of the Shared Socioeconomic Pathways (SSPs). A short summary of the scenarios behind the SSPs is available through a Population-Environment Research Network cyberseminar expert statement by Leiwen Jiang entitled "Internal consistency of assumption and projection of demographic factors in the SSPs scenarios". Additional information is available via the International Institute for Applied Systems Analysis (IIASA) SSP Database.