Google Earth Engine ——数据全解析专辑（世界第 4 版网格化人口 (GPWv4) 修订版30 弧秒1公里格网）人口数量和密度数据集

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发布于 2024-05-24 08:53:00

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发布于 2024-05-24 08:53:00

文章被收录于专栏：GEE数据专栏，GEE学习专栏，GEE错误集等专栏GEE数据专栏，GEE学习专栏，GEE错误集等专栏

The Gridded Population of World Version 4 (GPWv4), Revision 11 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 population count grids contain 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.

世界第 4 版网格化人口 (GPWv4) 修订版 11 对 2000、2005、2010、2015 和 2020 年在 30 弧秒（约 1 公里）网格单元上的全球人口分布进行建模。使用人口普查和行政单位的人口比例分配将人口分配到单元格。人口输入数据是在 2010 年普查结果中可用的最详细的空间分辨率收集的，普查结果发生在 2005 年和 2014 年之间。输入数据被外推以产生每个建模年份的人口估计值。这些人口计数网格包含与国家人口普查和人口登记一致的每 30 弧秒网格单元的人数估计值。每个建模年份有一个图像。

Dataset Availability

2000-01-01T00:00:00 - 2020-01-01T00:00:00

Dataset Provider

NASA SEDAC at the Center for International Earth Science Information Network

Collection Snippet

ee.ImageCollection("CIESIN/GPWv411/GPW_Population_Count")

Resolution

30 arc seconds

Bands Table

Name	Description	Min*	Max*
population_count	The estimated number of persons per 30 arc-second grid cell.	0	627597

人口数量代码：

var dataset = ee.ImageCollection("CIESIN/GPWv411/GPW_Population_Count").first();
var raster = dataset.select('population_count');
var raster_vis = {
  "max": 1000.0,
  "palette": [
    "ffffe7",
    "86a192",
    "509791",
    "307296",
    "2c4484",
    "000066"
  ],
  "min": 0.0
};
Map.setCenter(79.1, 19.81, 3);
Map.addLayer(raster, raster_vis, 'population_count');

人口密度代码：

var dataset = ee.ImageCollection("CIESIN/GPWv411/GPW_Population_Density").first();
var raster = dataset.select('population_density');
var raster_vis = {
  "max": 1000.0,
  "palette": [
    "ffffe7",
    "FFc869",
    "ffac1d",
    "e17735",
    "f2552c",
    "9f0c21"
  ],
  "min": 200.0
};
Map.setCenter(79.1, 19.81, 3);
Map.addLayer(raster, raster_vis, 'population_density');

数量

密度

调整后：
这些人口计数网格包含每 30 弧秒网格单元格中的人数估计值，在相对空间分布方面与国家人口普查和人口登记册一致，但进行了调整以匹配 2015 年联合国世界人口展望国家总数的修订版。每个建模年份有一个图像。

调整后的代码人口数量

var dataset = ee.ImageCollection("CIESIN/GPWv411/GPW_UNWPP-Adjusted_Population_Count").first();
var raster = dataset.select('unwpp-adjusted_population_count');
var raster_vis = {
  "max": 1000.0,
  "palette": [
    "ffffe7",
    "86a192",
    "509791",
    "307296",
    "2c4484",
    "000066"
  ],
  "min": 0.0
};
Map.setCenter(79.1, 19.81, 3);
Map.addLayer(raster, raster_vis, 'unwpp-adjusted_population_count');

调整后人口密度：

var dataset = ee.ImageCollection("CIESIN/GPWv411/GPW_UNWPP-Adjusted_Population_Density").first();
var raster = dataset.select('unwpp-adjusted_population_density');
var raster_vis = {
  "max": 1000.0,
  "palette": [
    "ffffe7",
    "FFc869",
    "ffac1d",
    "e17735",
    "f2552c",
    "9f0c21"
  ],
  "min": 0.0
};
Map.setCenter(79.1, 19.81, 3);
Map.addLayer(raster, raster_vis, 'unwpp-adjusted_population_density');