China 100m Urban change

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).