Google Earth Engine（GEE）下载全球土壤砂粒（Sand）含量数据

原创

生态遥感_才 2022-10-09 22:45:58 博主文章分类：GEE ©著作权

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数据介绍：

SoilGrids，是一个全球土壤属性地图，现在可以通过GEE下载。
SoilGrids是ISRIC–世界土壤信息的一个项目，旨在提供一个全球一致的、由数据驱动的系统，以预测土壤性质，并将其作为一项重要指标。该项目旨在提供一个全球一致的、由数据驱动的系统，使用全球协变量和全球拟合的模型预测土壤属性和类别，并采用数字土壤测绘方法。数据使用全球协变量和全球拟合的模型，通过基于量化随机森林的数字土壤地图方法来预测土壤属性和类别。

SoilGrids提供了六个不同深度的十种不同的土壤属性地图

分别是
sand_0-5cm
sand_5-15cm
sand_15-30cm
sand_30-60cm
sand_60-100cm
sand_100-200cm

今天以均值为例，下载全球土壤砂粒（Sand）含量数据

实现代码

var dataset = ee.Image("projects/soilgrids-isric/sand_mean"),//数据集
    roi = ee.FeatureCollection("users/lilei655123/shanxi");
var Sand=dataset.clip(roi)
var visualization = {
  bands: ['sand_0-5cm_mean'],
  min: 2.0,
  max: 1000.0,
  palette: [
    "FFFF00","F8F806","F1F10C","EBEB13","E4E419","DDDD20",
    "D7D726","D0D02D","CACA33","C3C33A","BCBC41","B6B647",
    "B0B04E","A9A954","A3A35A","9C9C61","959568","8F8F6E",
    "898975","82827B","7B7B82","757589","6E6E8F","686895",
    "61619C","5A5AA3","5454A9","4D4DB0","4747B6","4141BC",
    "3A3AC3","3333CA","2D2DD0","2626D7","2020DD","1919E4",
    "1212EB","0C0CF1","0606F8","0000FF",
  ]
};
Map.centerObject(roi,7)
var styling = {color:"red",fillColor:"00000000"};
Map.addLayer(roi.style(styling),{},"geometry")
Map.addLayer(Sand, visualization, "Sand  content in % (g / kg)");
print(Sand)
var division_Sand = Sand.divide(10);
Map.addLayer(division_Sand, visualization, "Sand%");
    Export.image.toDrive({ 
    image: division_Sand,// 
    description: 'Sand',// 
    scale: 30,//
    region:roi,//
    maxPixels:1e13,
    crs:'EPSG:4326',
    folder:'Sand',
   fileFormat: 'GeoTIFF', 
    });