تحتوي مجموعة البيانات هذه على تقديرات لعدد الأشخاص
لكل كيلومتر مربّع، بما يتوافق مع الإحصاءات الوطنية وسجلات السكان. تتوفّر صورة واحدة لكل سنة تم وضع نموذج لها.
يقدّم الإصدار 11 من "تعداد السكان في العالم" (GPWv4) توزيعًا
للسكان في العالم خلال الأعوام 2000 و2005 و2010 و2015 و2020
في خلايا شبكية تبلغ مساحتها 30 ثانية قوسية (كيلومتر واحد تقريبًا). يتم توزيع السكان على الخلايا باستخدام التوزيع النسبي للسكان من التعداد السكاني والوحدات الإدارية. يتم جمع بيانات السكان المدخلة بأعلى دقة مكانية متاحة من نتائج جولة التعدادات لعام 2010 التي أُجريت بين عامَي 2005 و2014. يتم استقراء بيانات الإدخال لإنتاج تقديرات عدد السكان لكل سنة تم وضع نموذج لها.
النطاقات
حجم البكسل 927.67 متر
النطاقات
الاسم
الحد الأدنى
الحد الأقصى
حجم البكسل
الوصف
population_density
0*
810694*
أمتار
يشير هذا المقياس إلى العدد المقدَّر للأشخاص في كل كيلومتر مربّع.
مركز شبكة معلومات علوم الأرض الدولية (CIESIN) في "جامعة كولومبيا" 2018 Gridded Population of the World, Version 4
(GPWv4): Population Density, Revision 11. Palisades, NY: NASA Socioeconomic Data and
Applications Center (SEDAC). https://doi.org/10.7927/H49C6VHW.
تم الوصول إليه في DAY MONTH YEAR.
تحتوي مجموعة البيانات هذه على تقديرات لعدد الأشخاص لكل كيلومتر مربّع بما يتوافق مع الإحصاءات الوطنية وسجلات السكان. تتوفّر صورة واحدة لكل سنة تم وضع نموذج لها. General Documentation The Gridded Population of World Version 4 (GPWv4), Revision 11 models the distribution of global human population for the years 2000, …
[null,null,[],[[["\u003cp\u003eThe GPWv411: Population Density dataset provides estimates of the number of people per square kilometer based on national censuses and population registers.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset models global human population distribution for 2000, 2005, 2010, 2015, and 2020 at approximately 1km resolution.\u003c/p\u003e\n"],["\u003cp\u003ePopulation data is allocated to grid cells using proportional allocation from census and administrative units, extrapolated from the 2010 round of censuses.\u003c/p\u003e\n"],["\u003cp\u003eIt is available under the CC-BY-4.0 license and provided by NASA SEDAC at the Center for International Earth Science Information Network.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is accessible through Google Earth Engine and includes one image for each modeled year with a 'population_density' band.\u003c/p\u003e\n"]]],[],null,["# GPWv411: 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/H49C6VHW)\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 square kilometer consistent with national censuses and population\nregisters. 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| `population_density` | 0\\* | 810694\\* | 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): Population Density, Revision 11. Palisades, NY: NASA Socioeconomic Data and\n Applications Center (SEDAC). \u003chttps://doi.org/10.7927/H49C6VHW\u003e.\n Accessed DAY MONTH YEAR.\n\n### DOIs\n\n- \u003chttps://doi.org/10.7927/H49C6VHW\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_Population_Density').first();\nvar raster = dataset.select('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': 200.0\n};\nMap.setCenter(79.1, 19.81, 3);\nMap.addLayer(raster, raster_vis, 'population_density');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/CIESIN/CIESIN_GPWv411_GPW_Population_Density) \n[GPWv411: Population Density (Gridded Population of the World Version 4.11)](/earth-engine/datasets/catalog/CIESIN_GPWv411_GPW_Population_Density) \nThis dataset contains estimates of the number of persons per square kilometer consistent with national censuses and population registers. There is one image for each modeled year. General Documentation The Gridded Population of World Version 4 (GPWv4), Revision 11 models the distribution of global human population for the years 2000, ... \nCIESIN/GPWv411/GPW_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/H49C6VHW](https://doi.org/https://doi.org/10.7927/H49C6VHW)\n- [https://doi.org/10.7927/H49C6VHW](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/CIESIN_GPWv411_GPW_Population_Density)"]]
