Table 1. Input datasets, used to produce the WorldPop Archive 100 m tiles and 1 km global mosaics.

Name	Acquisition Year	Source	Version, Publication Year	Data Type	Spatial Resolution	Format/ Pixel Type & Depth	Spatial Reference	Spatial Coverage
Input datasets are here described. Data source, version, format, and spatial and temporal statistics are summarised. The table shows input grids from which WorldPop base grids (topography, slope, country ID, and country area) are prepared, and shows additional datasets subsequently standardised and gridded for inclusion in the archive. Refer to the Methods section for a more detailed description of how base datasets and the additional datasets are produced.
Viewfinder Panoramas	~2000	de Ferranti, J35	26/05/14	Elevation, continuous raster	Typically 3′′ (~90 m)	HGT tiles/ int16	GCS WGS 1984	Global
GADM	2012/ 2015	Global ADMinistrative Areas (GADM)37	v2/v2.8	Global Admin. Boundaries (Country borders), categorical vector	Comparable to 3′′ (~90 m)	ESRI polygon shapefile	GCS WGS 1984	Global
Gridded Population of the World (GPW)	2010	Center for International Earth Science Information Network (CIESIN), Columbia University11	v4, 2014	Global Population Count/ Density (Country borders), continuous raster	30′′ (~900 m)	Geo-tiff/ flt32	GCS WGS 1984	Global
Climate Hazards Group Infrared Precipitation with Stations (CHIrPS)	1981–2014	Funk, C., et al.55	v2, 2015	Annual precipitation, continuous raster	~180′′ (~6 km)	Geo-tiff/ flt32	GCS WGS 1984	Between latitudes 50° North and 50° South
DMSP Nightlights Time Series	1992–2013	US NOAA National Geophysical Data Center58	v4, 2014	Night lights intensity, continuous raster	30′′ (~900 m)	Geo-tiff/ uint8	GCS WGS 1984	Between latitudes 75° North and 65° South
Globcover	2009	European Space Agency (ESA) & Université Catholique De Louvain (UCL)60	2010	Land cover, categorical raster	7.5′′ (~250 m)	Geo-tiff/ uint8	GCS WGS 1984	Global
Landsat	<2000	University of Maryland, Department of Geography62	v1, 2015	Inland water bodies, categorical raster	1′′ (~30 m)	Geo-tiff tiles/ uint16	UTM WGS 1984	Global
MODIS MOD44W Collection 5	2000–2002	University of Maryland, Department of Geography/ US NASA63	2009	Inland water bodies, categorical raster	7.5′′ (~250 m)	Geo-tiff tiles/ uint8	GCS WGS 1984	Global
Open Street Map (OSM)	2016	OpenStreetMap Foundation (OSMF) & Contributors64	15/01/16	General mapping, categorical vector	Comparable to 1′′ (~30 m)	PBF database	GCS WGS 1984	Global
SRTM SWBD	~2000	US NASA & US National Geospatial-Intelligence Agency (NGA)71	v2, 12/03/03	Inland water bodies, categorical vector	Comparable to 1′′ (~30 m)	ESRI polygon shapefile tiles	GCS WGS 1984	Between latitudes 60°2' North and 56° South
GTOPO30 HYDRO 1 K	<1996	US Geological Survey EROS Data Center72	1996	Inland water bodies, categorical vector	Comparable to 30′′ (~900 m)	ESRI polygon shapefile tiles	GCS WGS 1984	Greater than latitudes 60°2' North and 56° South
Travel Time To Major Cities	2000	Nelson, A. (European Commission Joint Research Centre Global Environment Monitoring Unit)74	2008	Travel time, continuous raster	30′′ (~900 m)	Flt/flt32	GCS WGS 1984	Global