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    WorldPop spatiotemporal change dataset details
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    DATASET: Alpha version of temporally-comparable 1990, 2000, and 2010 estimates of numbers of people per pixel ('ppp') and people per hectare ('pph') - produced using covariates that are either time-invariant or temporally explicit.
    REGION: Asia
    SPATIAL RESOLUTION: 0.000833333 decimal degrees (approx 100m at the equator)
    PROJECTION: Geographic, WGS84
    UNITS: Estimated persons per grid square
    MAPPING APPROACH: : Random Forest
    FORMAT: Geotiff (zipped using 7-zip (open access tool): www.7-zip.org)
    FILENAMES: Example - CHN_1990_gaul3_ppp_v2c_1990.tif = China (CHN) population per pixel (ppp) map for 1990 (1990) obtained using GAUL 3 boundary-matched census data, version 2c (v2c).
    DATE OF PRODUCTION: October 2015

    Details about the input data and how the datasets were generated are provided here: Gaughan, A. E. et al. Spatiotemporal patterns of population in mainland China, 1990 to 2010. Sci. Data 3:160005 doi: 10.1038/sdata.2016.5 (2016).

    DOI: 10.5258/SOTON/WP00057

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