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

CIESIN/GPWv4/ancillary-data-grids
Dataset Availability
2000-01-01T00:00:00 - 2020-01-01T00:00:00
Dataset Provider
Earth Engine Snippet
ee.Image("CIESIN/GPWv4/ancillary-data-grids")
Tags
population ciesin gpw

Description

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.

Bands

Resolution
30 arc seconds

Bands

Name Units Min Max Description
water-mask

Water mask

data-context

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

Licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

Citations

Citations:
  • 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). https://doi.org/10.7927/H4F47M2C. Accessed DAY MONTH YEAR.

  • Center for International Earth Science Information Network - CIESIN - Columbia University. 2016. Gridded Population of the World, Version 4 (GPWv4): Land and Water Area. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/H45M63M9. Accessed DAY MONTH YEAR.

  • Center for International Earth Science Information Network - CIESIN - Columbia University. 2016. Gridded Population of the World, Version 4 (GPWv4): National Identifier Grid. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/H41V5BX1. Accessed DAY MONTH YEAR.

DOI(s)

Explore in Earth Engine

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

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