GEE数据集:土壤网格250m v2.0

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此星光明 发表于 2023/02/27 19:42:30 2023/02/27
【摘要】 ​SoilGrids被设计成一个全球一致的、以数据为导向的系统,使用全球协变量和全球拟合模型预测土壤属性和类别。如果您正在寻找国家和/或地方层面的土壤信息,我们建议将SoilGrids的预测与来自国家和地方土壤地理数据库的土壤图进行比较。国家土壤地图通常基于更详细的输入土壤信息,因此通常比SoilGrids更准确(在当地覆盖区域内)。关于国家和地区土壤数据库的概述,请参考《土壤地理数据库汇编...


SoilGrids被设计成一个全球一致的、以数据为导向的系统,使用全球协变量和全球拟合模型预测土壤属性和类别。如果您正在寻找国家和/或地方层面的土壤信息,我们建议将SoilGrids的预测与来自国家和地方土壤地理数据库的土壤图进行比较。国家土壤地图通常基于更详细的输入土壤信息,因此通常比SoilGrids更准确(在当地覆盖区域内)。关于国家和地区土壤数据库的概述,请参考《土壤地理数据库汇编》。平均值 "和 "中位数(0.5四分位数)"都可以作为特定单元的土壤属性的预测值。平均值代表 "预期值",并提供土壤属性的无偏预测。

Name Description Mapped units Conversion factor Conventional units Assets on GEE
bdod Bulk density of the fine earth fraction cg/cm³ 100 kg/dm³ bdod_mean
cec Cation Exchange Capacity of the soil mmol©/kg 10 cmol©/kg cec_mean
cfvo Volumetric fraction of coarse fragments (> 2 mm) cm3/dm3 (vol‰) 10 cm3/100cm3 (vol%) cfvo_mean
clay Proportion of clay particles (< 0.002 mm) in the fine earth fraction g/kg 10 g/100g (%) clay_mean
nitrogen Total nitrogen (N) cg/kg 100 g/kg nitrogen_mean
phh2o Soil pH pHx10 10 pH phh2o_mean
sand Proportion of sand particles (> 0.05 mm) in the fine earth fraction g/kg 10 g/100g (%) sand_mean
silt Proportion of silt particles (≥ 0.002 mm and ≤ 0.05 mm) in the fine earth fraction g/kg 10 g/100g (%) silt_mean
soc Soil organic carbon content in the fine earth fraction dg/kg 10 g/kg soc_mean
ocd Organic carbon density hg/dm³ 10 kg/dm³ ocd_mean
ocs Organic carbon stocks t/ha 10 kg/m² ocs_mean

文献引用:

var isric_bdod_mean = ee.Image("projects/soilgrids-isric/bdod_mean");
var isric_cec = ee.Image("projects/soilgrids-isric/cec_mean");
var isric_cfvo = ee.Image("projects/soilgrids-isric/cfvo_mean");
var isric_clay = ee.Image("projects/soilgrids-isric/clay_mean");
var isric_sand = ee.Image("projects/soilgrids-isric/sand_mean");
var isric_silt = ee.Image("projects/soilgrids-isric/silt_mean");
var isric_nitrogen = ee.Image("projects/soilgrids-isric/nitrogen_mean");
var isric_phh20 = ee.Image("projects/soilgrids-isric/phh2o_mean");
var isric_soc = ee.Image("projects/soilgrids-isric/soc_mean");
var isric_ocd = ee.Image("projects/soilgrids-isric/ocd_mean");
var isric_ocs = ee.Image("projects/soilgrids-isric/ocs_mean");

//print example image metadata and description
print(sand_mean)

//Add all layer to Map
Map.addLayer(sand_mean.select('sand_0-5cm_mean'),{min: 50, max: 1000,palette: ['5d5851','635a4b','6a5b44','715c3d','785e36','7e5f30','856129','8c6222','92641c','996515','a0660e','a66808','ad6901']},'SoilGrids250m 2.0 - Sand content ISRIC_0_5cm')

//Set basemap to Hybrid view
Map.setOptions('HYBRID')

代码链接:https://code.earthengine.google.com/?scriptPath=users/sat-io/awesome-gee-catalog-examples:soil-properties/ISRIC-SOIL-GRID-250

Data available from

www.soilgrids.org.

Publication date

2020-05-04

Period

Fri Mar 31 1905 19:00:00 GMT-0500 Mon Jul 04 2016 20:00:00 GMT-0400

Provided by :

International Soil Reference and Information Centre (ISRIC)

License

Attribution 4.0 International (CC BY 4.0)

DOI

ISRIC Data Hub

Created and Curated by: International Soil Reference and Information Centre (ISRIC)

Keywords: For example Global Soilgrid, Sandy Soil, ISRIC

Last updated: 2020-10-20

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