iSDAsoil Sand Content

ISDASOIL/Africa/v1/sand_content
数据集可用性
2001-01-01T00:00:00Z–2017-01-01T00:00:00Z
数据集提供商
Earth Engine 代码段
ee.Image("ISDASOIL/Africa/v1/sand_content")
标签
非洲 isda 沙 土壤

说明

土壤深度为 0-20 厘米和 20-50 厘米时的沙含量，预测的平均值和标准差。 在茂密丛林地区（通常位于非洲中部），模型准确度较低，因此可能会看到条带状伪影。

土壤属性预测由 Innovative Solutions for Decision Agriculture Ltd. (iSDA) 使用机器学习与遥感数据以及超过 10 万个已分析土壤样本的训练集相结合，以 30 米像素大小进行。

如需了解详情，请参阅常见问题解答和技术信息文档。如需提交问题或请求支持，请访问 iSDAsoil 网站。

频段

像素大小
30 米

频段

名称 单位 最小值 最大值 像素尺寸 说明
mean_0_20 % 2 94 米

沙含量，0-20 厘米深度的预测平均值
mean_20_50 % 2 95 米

沙含量，20-50 厘米深度的预测平均值
stdev_0_20 % 0 144 米

沙含量，0-20 厘米深度的标准差
stdev_20_50 % 0 143 米

20-50 厘米深度的沙含量标准差

使用条款

使用条款

CC-BY-4.0

引用

引用：

  • Hengl, T.、Miller, M.A.E.，Križan, J. 等人。使用双尺度集成机器学习技术，以 30 米的空间分辨率绘制非洲土壤属性和养分地图。Sci Rep 11, 6130 (2021). doi:10.1038/s41598-021-85639-y

使用 Earth Engine 探索

代码编辑器 (JavaScript)

var mean_0_20 =
'<RasterSymbolizer>' +
 '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#00204D" label="0-31" opacity="1" quantity="31"/>' +
  '<ColorMapEntry color="#002D6C" label="31-39" opacity="1" quantity="39"/>' +
  '<ColorMapEntry color="#16396D" label="39-43" opacity="1" quantity="43"/>' +
  '<ColorMapEntry color="#36476B" label="43-46" opacity="1" quantity="46"/>' +
  '<ColorMapEntry color="#4B546C" label="46-49" opacity="1" quantity="49"/>' +
  '<ColorMapEntry color="#5C616E" label="49-52" opacity="1" quantity="52"/>' +
  '<ColorMapEntry color="#6C6E72" label="52-54" opacity="1" quantity="54"/>' +
  '<ColorMapEntry color="#7C7B78" label="54-56" opacity="1" quantity="56"/>' +
  '<ColorMapEntry color="#8E8A79" label="56-58" opacity="1" quantity="58"/>' +
  '<ColorMapEntry color="#A09877" label="58-60" opacity="1" quantity="60"/>' +
  '<ColorMapEntry color="#B3A772" label="60-63" opacity="1" quantity="63"/>' +
  '<ColorMapEntry color="#C6B66B" label="63-65" opacity="1" quantity="65"/>' +
  '<ColorMapEntry color="#DBC761" label="65-68" opacity="1" quantity="68"/>' +
  '<ColorMapEntry color="#F0D852" label="68-71" opacity="1" quantity="71"/>' +
  '<ColorMapEntry color="#FFEA46" label="71-100" opacity="1" quantity="75"/>' +
 '</ColorMap>' +
 '<ContrastEnhancement/>' +
'</RasterSymbolizer>';

var mean_20_50 =
'<RasterSymbolizer>' +
 '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#00204D" label="0-31" opacity="1" quantity="31"/>' +
  '<ColorMapEntry color="#002D6C" label="31-39" opacity="1" quantity="39"/>' +
  '<ColorMapEntry color="#16396D" label="39-43" opacity="1" quantity="43"/>' +
  '<ColorMapEntry color="#36476B" label="43-46" opacity="1" quantity="46"/>' +
  '<ColorMapEntry color="#4B546C" label="46-49" opacity="1" quantity="49"/>' +
  '<ColorMapEntry color="#5C616E" label="49-52" opacity="1" quantity="52"/>' +
  '<ColorMapEntry color="#6C6E72" label="52-54" opacity="1" quantity="54"/>' +
  '<ColorMapEntry color="#7C7B78" label="54-56" opacity="1" quantity="56"/>' +
  '<ColorMapEntry color="#8E8A79" label="56-58" opacity="1" quantity="58"/>' +
  '<ColorMapEntry color="#A09877" label="58-60" opacity="1" quantity="60"/>' +
  '<ColorMapEntry color="#B3A772" label="60-63" opacity="1" quantity="63"/>' +
  '<ColorMapEntry color="#C6B66B" label="63-65" opacity="1" quantity="65"/>' +
  '<ColorMapEntry color="#DBC761" label="65-68" opacity="1" quantity="68"/>' +
  '<ColorMapEntry color="#F0D852" label="68-71" opacity="1" quantity="71"/>' +
  '<ColorMapEntry color="#FFEA46" label="71-100" opacity="1" quantity="75"/>' +
 '</ColorMap>' +
 '<ContrastEnhancement/>' +
'</RasterSymbolizer>';

var stdev_0_20 =
'<RasterSymbolizer>' +
 '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#fde725" label="low" opacity="1" quantity="2"/>' +
  '<ColorMapEntry color="#5dc962" label=" " opacity="1" quantity="3"/>' +
  '<ColorMapEntry color="#20908d" label=" " opacity="1" quantity="4"/>' +
  '<ColorMapEntry color="#3a528b" label=" " opacity="1" quantity="6"/>' +
  '<ColorMapEntry color="#440154" label="high" opacity="1" quantity="7"/>' +
 '</ColorMap>' +
 '<ContrastEnhancement/>' +
'</RasterSymbolizer>';

var stdev_20_50 =
'<RasterSymbolizer>' +
 '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#fde725" label="low" opacity="1" quantity="2"/>' +
  '<ColorMapEntry color="#5dc962" label=" " opacity="1" quantity="3"/>' +
  '<ColorMapEntry color="#20908d" label=" " opacity="1" quantity="4"/>' +
  '<ColorMapEntry color="#3a528b" label=" " opacity="1" quantity="6"/>' +
  '<ColorMapEntry color="#440154" label="high" opacity="1" quantity="7"/>' +
 '</ColorMap>' +
 '<ContrastEnhancement/>' +
'</RasterSymbolizer>';
var raw = ee.Image("ISDASOIL/Africa/v1/sand_content");
Map.addLayer(
    raw.select(0).sldStyle(mean_0_20), {},
    "Sand content, mean visualization, 0-20 cm");
Map.addLayer(
    raw.select(1).sldStyle(mean_20_50), {},
    "Sand content, mean visualization, 20-50 cm");
Map.addLayer(
    raw.select(2).sldStyle(stdev_0_20), {},
    "Sand content, stdev visualization, 0-20 cm");
Map.addLayer(
    raw.select(3).sldStyle(stdev_20_50), {},
    "Sand content, stdev visualization, 20-50 cm");

var converted = raw.divide(10).exp().subtract(1);

var visualization = {min: 0, max: 3000};

Map.setCenter(25, -3, 2);

Map.addLayer(converted.select(0), visualization, "Sand content, mean, 0-20 cm");
在代码编辑器中打开
土壤深度为 0-20 厘米和 20-50 厘米时的沙含量，预测的平均值和标准差。在茂密丛林地区（通常位于非洲中部），模型准确度较低，因此可能会看到条带状伪影。土壤属性预测由 Innovative Solutions for Decision Agriculture Ltd. 进行…
ISDASOIL/Africa/v1/sand_content, africa,isda,sand,soil
2001-01-01T00:00:00Z/2017-01-01T00:00:00Z
-35.22 -31.46 37.98 57.08
Google Earth Engine