The Chinese soil organic matter data set has a resolution of 30 arc seconds (about 1 km at the equator) and includes the following soil physical and chemical properties: pH value, organic matter content, cation exchange capacity, root abundance, total nitrogen (N), total phosphorus (P) , total potassium (K), alkaline hydrolyzable nitrogen, available phosphorus, available potassium, exchangeable H+, Al3+, Ca2+, Mg2+, K+, Na+, soil layer thickness, soil profile depth, sand, silt and C. Paved portion, rock fragments, bulk density, porosity, structure, consistency and soil color. Vertical changes in soil properties were recorded by 8 layers with a depth of 2.3 m (i.e. 0-0.045, 0.045-0.091, 0.091-0.166, 0.166-0.289, 0.289-0.493, 0.493-0.829, 0.829-1.383 and 1.383-2.296 m), To facilitate use in the Common Land Model and Community Land Model (CLM). Preface – Artificial Intelligence Tutorial
Dataset ID:
TPDC/china_soil_LSM
Time Range: 1980s - no date
Scope: Nationwide
Source: National Tibetan Plateau Scientific Data Center
Copy code snippet:
var images = pie.ImageCollection("TPDC/china_soil_LSM")
| name | type | unit | Resolution (arc seconds) | Invalid value | Description |
|---|---|---|---|---|---|
| AND | float | mg/kg | 30 | -999 | Available K, available K content |
| AL | float | me/100g | 30 | -999 | Exchangeable AL3+, exchangeable Al3+ ions |
| AN | float | mg/kg | 30 | -999 | Alkali-hydrolysable N, content of alkali-hydrolysable nitrogen |
| AP | float | mg/kg | 30 | -999 | Available P, available P content |
| BD | float | g/cm3 | 30 | -999 | Bulk Density, bulk density |
| C1 | int | -- | 30 | -999 | Consistency, soil holding capacity |
| C2 | int | -- | 30 | -999 | Consistency, soil holding capacity |
| CA | float | me/100g | 30 | -999 | Exchangeable Ca2+, exchangeable Ca2+ ions |
| CEC | float | me/100g | 30 | -999 | Cation Exchange Capacity (CEC), cation exchange capacity (CEC) |
| CL | float | g/100g | 30 | -999 | Particle size distribution, clay content |
| CW1 | float | -- | 30 | -999 | soil holding ratio |
| CW2 | float | -- | 30 | -999 | soil holding ratio |
| Dh | float | -- | 30 | -999 | Dry Color hue, soil tone (dry soil) |
| Dc | float | -- | 30 | -999 | Dry Color chroma, soil color (dry soil) |
| Dv | float | -- | 30 | -999 | Dry Color value, soil color value (dry soil) |
| GRAV | float | g/100g | 30 | -999 | rock fragments |
| H | float | me/100g | 30 | -999 | Exchangeable H+, exchangeable H+ ions |
| K | float | me/100g | 30 | -999 | Exchangeable K+, exchangeable K+ ions |
| LDE | float | cm | 30 | -999 | soil depth |
| LDEP | float | cm | 30 | -999 | soil depth |
| LINEN | int | cm | 30 | -999 | soil depth |
| LNUM | int | cm | 30 | -999 | soil depth |
| MG | float | me/100g | 30 | -999 | Exchangeable Mg2+, exchangeable Mg2+ ions |
| THAT | float | me/100g | 30 | -999 | Exchangeable Na+, exchangeable Na+ ions |
| PH | float | -- | 30 | -999 | pH value |
| BY | float | cm3/100cm3 | 30 | -999 | Porosity, porosity |
| R | float | -- | 30 | -999 | Root Abundance Description, root abundance |
| RC | float | cm | 30 | -999 | Depth to bottom of soil layer (soils with multiple consistency classes) |
| RS | float | cm | 30 | -999 | Depth to bottom of soil layer (soils with multiple structural categories) |
| S1 | int | -- | 30 | -999 | soil structure type |
| S2 | int | -- | 30 | -999 | soil structure type |
| AND | float | g/100g | 30 | -999 | Particle size distribution, silt content |
| on | float | g/100g | 30 | -999 | Particle size distribution, sand content |
| AS | float | g/100g | 30 | -999 | soil organic matter |
| SW1 | float | -- | 30 | -999 | Soil structure type proportion |
| SW2 | float | -- | 30 | -999 | Soil structure type proportion |
| TK | float | g/100g | 30 | -999 | Total K |
| TN | float | g/100g | 30 | -999 | Total N |
| TP | float | g/100g | 30 | -999 | Total P |
| Unc | float | -- | 30 | -999 | Soil color (unclear soil moisture content) |
| Unh | float | -- | 30 | -999 | Soil tone (unclear soil moisture content) |
| Wh | float | -- | 30 | -999 | Wet Color hue, soil hue (wet soil) |
| Wc | float | -- | 30 | -999 | Wet Color chroma, soil color (wet soil) |
| Wv | float | -- | 30 | -999 | Wet Color value, soil color value (wet soil) |
| date |
string |
Image date |
Code:
/**
中国土壤有机质数据集
*/
//加载1981年中国土壤有机质数据
var img = pie.ImageCollection('TPDC/china_soil_LSM/TK') //按数据集描述中名称分为44个数据，分别对应表格中的每一行，如：AK、AL、AN……Wc、Wh、Wv
.select("TK_5") //每个数据中有8个波段,此数据的波段为："TK_1"，"TK_2","TK_3","TK_4","TK_5","TK_6","TK_7","TK_8"
print(img);
//设定预览参数
visParams = {
min: 1, max: 2.2,
palette: ['#AC77B1', '#443A93', '#6898C5', '#8CC892',
'#8BC84C','#EFDB09', '#E87A23', '#722124']};
//加载显示影像
Map.addLayer(img, visParams, '1981年中国土壤有机质数据');
Data citation:
Dai Jiongyuan, Shangguan Wei. China soil organic matter data set. National Tibetan Plateau Scientific Data Center, 2019. DOI: 10.11888/Soil.tpdc.270281. CSTR: 18406.11.Soil.tpdc.270281.
References:
1. Shangguan , W. , Dai , YJ , Liu , BY , Zhu , AX , Duan , QY , Wu , LZ , Ji , DY , Ye , AZ , Yuan , H. , Zhang , Q. , Chen , . DD , Chen , M. , Chu , JT , Dou , YJ , Guo , JX , Li , HQ , Li , JJ , Lu , L. , Xiao , L. , Liu , HP , Liu , SY , Miao , CY , Zhang , YZ ( 2013 ). A China Dataset of Soil Properties for Land Surface Modeling. Journal of Advances in Modeling Earth Systems. doi:10.1002/jame.20026.