Ten zbiór danych zawiera szacunki liczby osób w każdej komórce siatki o rozmiarze 30 sekund łuku, które są zgodne z danymi z narodowych spisów powszechnych i rejestrów ludności. Każdy modelowany rok ma przypisany jeden obraz.
Model Gridded Population of World Version 4 (GPWv4), Revision 11 przedstawia rozkład ludności na świecie w latach 2000, 2005, 2010, 2015 i 2020 w komórkach siatki o rozmiarze 30 sekund łuku (około 1 km). Populacja jest rozdzielana na komórki za pomocą proporcjonalnego przydzielania populacji z jednostek spisowych i administracyjnych. Dane wejściowe dotyczące populacji są zbierane w najbardziej szczegółowej rozdzielczości przestrzennej dostępnej na podstawie wyników spisu powszechnego z 2010 r., który przeprowadzono w latach 2005–2014. Dane wejściowe są ekstrapolowane, aby uzyskać szacunkowe dane dotyczące populacji w każdym modelowanym roku.
Pasma
Rozmiar piksela 927,67 m
Pasma
Nazwa
Minimum
Maks.
Rozmiar piksela
Opis
population_count
0*
627597*
metry
Szacunkowa liczba osób w komórce siatki o rozmiarze 30 sekund łuku.
Center for International Earth Science Information Network (CIESIN) – Columbia University. 2018 r. Gridded Population of the World, Version 4 (GPWv4): Population Count, Revision 11. Palisades, NY: NASA Socioeconomic Data and
Applications Center (SEDAC). https://doi.org/10.7927/H4JW8BX5.
Dostęp: DAY MONTH YEAR.
Ten zbiór danych zawiera szacunki liczby osób w komórce siatki o rozmiarze 30 sekund łuku, które są zgodne z danymi z narodowych spisów powszechnych i rejestrów ludności. Każdy modelowany rok ma przypisany jeden obraz. Uwaga dotycząca ogólnej dokumentacji: ponieważ ta kolekcja ma zasadę piramidy MEAN, oddalenie powoduje utratę informacji. Obliczenia muszą …
[null,null,[],[[["\u003cp\u003eThe Gridded Population of the World Version 4 (GPWv4), Revision 11 dataset provides estimates of the human population distributed across the globe on a 30 arc-second grid for the years 2000, 2005, 2010, 2015, and 2020.\u003c/p\u003e\n"],["\u003cp\u003ePopulation counts are modeled based on national censuses and population registers, using proportional allocation to distribute population within grid cells.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is available from NASA's Socioeconomic Data and Applications Center (SEDAC) and is accessible through Google Earth Engine.\u003c/p\u003e\n"],["\u003cp\u003eIt's important to note that zooming out on this dataset in Earth Engine can lead to information loss due to the dataset's pyramid policy of MEAN, so calculations should be done at native resolution.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is licensed under CC-BY-4.0 and requires attribution to CIESIN - Columbia University.\u003c/p\u003e\n"]]],["The dataset from NASA SEDAC, accessible via Earth Engine, provides gridded population data (GPWv4) from 2000 to 2020, updated every five years. It estimates the number of people per 30 arc-second grid cell (approximately 1km) using census and population registers. The `population_count` band represents the estimated number of persons per grid cell, with a pixel size of 927.67 meters. Data is distributed proportionally from census units, extrapolated for modeled years. The data should be calculated at its native resolution due to the data model.\n"],null,["# GPWv411: Population Count (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/H4JW8BX5)\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 per\n30 arc-second grid cell 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-count-rev11/docs)\n| **Note:** Because this collection has a pyramid policy of MEAN, zooming out results in information loss. Calculations need to be performed at native resolution.\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_count` | 0\\* | 627597\\* | meters | The estimated number of persons per 30 arc-second grid cell. |\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 Count, Revision 11. Palisades, NY: NASA Socioeconomic Data and\n Applications Center (SEDAC). \u003chttps://doi.org/10.7927/H4JW8BX5\u003e.\n Accessed DAY MONTH YEAR.\n\n### DOIs\n\n- \u003chttps://doi.org/10.7927/H4JW8BX5\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_Count').first();\nvar raster = dataset.select('population_count');\nvar raster_vis = {\n 'max': 1000.0,\n 'palette': [\n 'ffffe7',\n '86a192',\n '509791',\n '307296',\n '2c4484',\n '000066'\n ],\n 'min': 0.0\n};\nMap.setCenter(79.1, 19.81, 3);\nMap.addLayer(raster, raster_vis, 'population_count');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/CIESIN/CIESIN_GPWv411_GPW_Population_Count) \n[GPWv411: Population Count (Gridded Population of the World Version 4.11)](/earth-engine/datasets/catalog/CIESIN_GPWv411_GPW_Population_Count) \nThis dataset contains estimates of the number of persons per 30 arc-second grid cell consistent with national censuses and population registers. There is one image for each modeled year. General Documentation Note: Because this collection has a pyramid policy of MEAN, zooming out results in information loss. Calculations need to ... \nCIESIN/GPWv411/GPW_Population_Count, 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/H4JW8BX5](https://doi.org/https://doi.org/10.7927/H4JW8BX5)\n- [https://doi.org/10.7927/H4JW8BX5](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/CIESIN_GPWv411_GPW_Population_Count)"]]
