Cet ensemble de données contient des estimations du nombre de personnes par cellule de grille de 30 secondes d'arc, conformément aux recensements nationaux et aux registres de population en ce qui concerne la distribution spatiale relative, mais ajustées pour correspondre aux totaux par pays de la révision 2015 des Perspectives de la population mondiale des Nations Unies. Il existe une image pour chaque année modélisée.
La version 4 (révision 11) de la grille de population mondiale (GPWv4) modélise la répartition de la population humaine mondiale pour les années 2000, 2005, 2010, 2015 et 2020 dans des cellules de grille de 30 secondes d'arc (environ 1 km). La population est répartie dans les cellules à l'aide d'une allocation proportionnelle de la population à partir des unités administratives et de recensement. Les données de population en entrée sont collectées à la résolution spatiale la plus détaillée disponible à partir des résultats de la série de recensements de 2010, qui ont eu lieu entre 2005 et 2014. Les données d'entrée sont extrapolées pour produire des estimations de population pour chaque année modélisée.
Center for International Earth Science Information Network – CIESIN – Université de Columbia. 2018. Gridded Population of the World, Version 4 (GPWv4.11) : densité de population ajustée pour correspondre à la révision 2015 des totaux par pays de la révision 11 des Perspectives de la population mondiale des Nations unies. Palisades, NY : NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/H4F47M65.
Consulté le JOUR MOIS ANNÉE.
Cet ensemble de données contient des estimations du nombre de personnes par cellule de grille de 30 secondes d'arc. Il est cohérent avec les recensements nationaux et les registres de population en ce qui concerne la distribution spatiale relative, mais il est ajusté pour correspondre aux totaux par pays de la révision 2015 des Perspectives de la population mondiale de l'ONU. Il existe une image pour chaque année modélisée. Général …
[null,null,[],[[["\u003cp\u003eThe Gridded Population of the World, Version 4 (GPWv4), Revision 11, provides estimates of human population density globally for the years 2000, 2005, 2010, 2015, and 2020.\u003c/p\u003e\n"],["\u003cp\u003ePopulation data is modeled on a 30 arc-second (approximately 1km) grid and is based on national censuses and population registers, adjusted to the 2015 Revision of UN World Population Prospects.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is available through Google Earth Engine and is provided by NASA SEDAC at the Center for International Earth Science Information Network.\u003c/p\u003e\n"],["\u003cp\u003eIt's licensed under CC-BY-4.0 and is free to use for research, education, and non-profit purposes.\u003c/p\u003e\n"]]],[],null,["# GPWv411: UN-Adjusted Population Density (Gridded Population of the World Version 4.11)\n\nDataset Availability\n: 2000-01-01T00:00:00Z--2020-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA SEDAC at the Center for International Earth Science Information Network](https://doi.org/10.7927/H4F47M65)\n\nCadence\n: 5 Years\n\nTags\n:\n[ciesin](/earth-engine/datasets/tags/ciesin) [gpw](/earth-engine/datasets/tags/gpw) [nasa](/earth-engine/datasets/tags/nasa) [population](/earth-engine/datasets/tags/population) \n\n#### Description\n\nThis dataset contains estimates of the number of persons\nper 30 arc-second grid cell, consistent with national censuses and\npopulation registers with respect to relative spatial distribution but\nadjusted to match the 2015 Revision of UN World Population Prospects\ncountry totals. There is one image for each modeled year.\n\n[General Documentation](https://sedac.ciesin.columbia.edu/data/set/gpw-v4-population-density-rev11/docs)\n\nThe Gridded Population of World Version 4 (GPWv4), Revision 11 models the distribution\nof global human population for the years 2000, 2005, 2010, 2015, and 2020\non 30 arc-second (approximately 1 km) grid cells. Population is distributed\nto cells using proportional allocation of population from census and\nadministrative units. Population input data are collected at the most\ndetailed spatial resolution available from the results of the 2010 round of\ncensuses, which occurred between 2005 and 2014. The input data are\nextrapolated to produce population estimates for each modeled year.\n\n### Bands\n\n\n**Pixel Size**\n\n927.67 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|-------------------------------------|-----|----------|------------|-------------------------------------------------------|\n| `unwpp-adjusted_population_density` | 0\\* | 778120\\* | meters | The estimated number of persons per square kilometer. |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\n[CC-BY-4.0](https://spdx.org/licenses/CC-BY-4.0.html)\n\n### Citations\n\nCitations:\n\n- Center for International Earth Science Information Network - CIESIN -\n Columbia University. 2018. Gridded Population of the World, Version 4\n (GPWv4.11): Population Density Adjusted to Match 2015 Revision of UN WPP\n Country Totals, Revision 11. Palisades, NY: NASA Socioeconomic Data and Applications\n Center (SEDAC). \u003chttps://doi.org/10.7927/H4F47M65\u003e.\n Accessed DAY MONTH YEAR.\n\n### DOIs\n\n- \u003chttps://doi.org/10.7927/H4F47M65\u003e\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('CIESIN/GPWv411/GPW_UNWPP-Adjusted_Population_Density').first();\nvar raster = dataset.select('unwpp-adjusted_population_density');\nvar raster_vis = {\n 'max': 1000.0,\n 'palette': [\n 'ffffe7',\n 'FFc869',\n 'ffac1d',\n 'e17735',\n 'f2552c',\n '9f0c21'\n ],\n 'min': 0.0\n};\nMap.setCenter(79.1, 19.81, 3);\nMap.addLayer(raster, raster_vis, 'unwpp-adjusted_population_density');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/CIESIN/CIESIN_GPWv411_GPW_UNWPP-Adjusted_Population_Density) \n[GPWv411: UN-Adjusted Population Density (Gridded Population of the World Version 4.11)](/earth-engine/datasets/catalog/CIESIN_GPWv411_GPW_UNWPP-Adjusted_Population_Density) \nThis dataset contains estimates of the number of persons per 30 arc-second grid cell, consistent with national censuses and population registers with respect to relative spatial distribution but adjusted to match the 2015 Revision of UN World Population Prospects country totals. There is one image for each modeled year. General ... \nCIESIN/GPWv411/GPW_UNWPP-Adjusted_Population_Density, ciesin,gpw,nasa,population \n2000-01-01T00:00:00Z/2020-01-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.7927/H4F47M65](https://doi.org/https://doi.org/10.7927/H4F47M65)\n- [https://doi.org/10.7927/H4F47M65](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/CIESIN_GPWv411_GPW_UNWPP-Adjusted_Population_Density)"]]
