GPWv4: Gridded Population of the World Version 4, Ancillary Data Grids [deprecated]

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Earth Engine Snippet
ciesin gpw population


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 produced.

General Documentation


927.67 meters


Name Units Min Max Description

Water mask


Categorizes pixels with estimated zero population based on information provided in the census documents.

mean-administrative-unit-area km^2 0* 816831*

The mean area of the input unit(s) from which population count and density grids are created.

national-identifier 4* 999*

An 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-area km^2 0* 0.86*

Estimate of the land area, excluding permanent ice and water, within each 30 arc-second pixel.

water-area km^2 0* 0.86*

Estimate of the water area (permanent ice and water) within each 30 arc-second pixel.

* estimated min or max value

data-context Class Table

Value Color Description
201 #099506 Park or protected area.
202 #ff0b00 Military district, airport zone, or other infrastructure.
203 #060606 Not enumerated or not reported in census.
204 #a5a5a5 No households.
205 #ffe152 Uninhabited.

Terms of Use

Terms of Use



  • 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.


Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.Image('CIESIN/GPWv4/ancillary-data-grids');
var zeroPopulationAreas ='data-context');
var zeroPopulationAreasVis = {
  min: 201.0,
  max: 205.0,
  palette: ['099506', 'ff0b00', '060606', 'a5a5a5', 'ffe152'],
Map.setCenter(-3.3, 36.03, 1);
    zeroPopulationAreas, zeroPopulationAreasVis, 'Zero Population Areas');
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