GPWv4: Gridded Population of the World Version 4, Ancillary Data Grids (CIESIN/GPWv4/ancillary-data-grids)

Version v4

The Gridded Population of World Version 4 (GPWv4) models the distribution
of global human population for the years 2000, 2005, 2010, 2015, and 2020
on 30 arc-second (approximately 1km) grid cells. Population is distributed
to cells using proportional allocation of population from census and
administrative units. Population input data are collected at the most
detailed spatial resolution available from the results of the 2010 round of
censuses, which occurred between 2005 and 2014. The input data are
extrapolated to produce population estimates for each modeled year.

These ancillary data grids contain additional per-pixel data that can be
used to assess the quality of the population estimates and how they were

water-maskWater mask
data-contextCategorizes pixels with estimated zero population based on information provided in the census documents.
mean-administrative-unit-areaThe mean area of the input unit(s) from which population count and density grids are created.
national-identifierAn integer that represents the census data source used to produce the GPWv4 population estimates. Pixels (grid cells) that have the same value reflect the same data source, most often a country or territory. Note that these data represent the area covered by the statistical data as provided, and are not official representations of country or territory boundaries.
land-areaEstimate of the land area, excluding permanent ice and water, within each 30 arc-second pixel.
water-areaEstimate of the water area (permanent ice and water) within each 30 arc-second pixel.


CIESIN (producer, licensor)
Google Earth Engine (host)
STAC Version 0.6.0
Keywords ciesin, gpw, population
License proprietary
Temporal Extent 12/31/1999, 4:00:00 PM - 12/31/2019, 4:00:00 PM
Citation Center for International Earth Science Information Network - CIESIN - Columbia University. 2016. Gridded Population of the World, Version 4 (GPWv4): Administrative Unit Center Points with Population Estimates. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). []( Accessed DAY MONTH YEAR.
Type image
GSD arc secondsm