Google Earth Engine（GEE）下載下傳全球土壤砂粒（Sand）含量資料

資料介紹：

SoilGrids，是一個全球土壤屬性地圖，現在可以通過GEE下載下傳。

SoilGrids是ISRIC–世界土壤資訊的一個項目，旨在提供一個全球一緻的、由資料驅動的系統，以預測土壤性質，并将其作為一項重要名額。該項目旨在提供一個全球一緻的、由資料驅動的系統，使用全球協變量和全球拟合的模型預測土壤屬性和類别，并采用數字土壤測繪方法。資料使用全球協變量和全球拟合的模型，通過基于量化随機森林的數字土壤地圖方法來預測土壤屬性和類别。

SoilGrids提供了六個不同深度的十種不同的土壤屬性地圖

分别是

sand_0-5cm

sand_5-15cm

sand_15-30cm

sand_30-60cm

sand_60-100cm

sand_100-200cm

今天以均值為例，下載下傳全球土壤砂粒（Sand）含量資料

實作代碼

var dataset = ee.Image("projects/soilgrids-isric/sand_mean"),//資料集
    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', 
    });      

結果以及下載下傳遇到的問題：

問題：下載下傳後的資料導出arcgis中沒有坐标系

解決方案：在導出函數中添加坐标系 crs:‘EPSG:4326’,

結果顯示：

完整代碼請在公衆号背景私信“1005下載下傳全球Sand含量資料”

公衆号名稱與部落格名稱一緻

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