China soil map based harmonized world soil database (HWSD) (v1.1) (2009)

The data is based on the Harmonized World Soil Database version 1.1 (HWSD) constructed by the Food and Agriculture Organization of the United Nations (FAO) and the Vienna International Institute for Applied Systems (IIASA). The data source of China is 1: 1 million soil data in the second national land survey provided by the Nanjing Soil Research Institute. The data can provide model input parameters for modelers, in agricultural perspective, it can be used to study eco-agricultural zoning, food security and climate change. The data format is grid and the projection is WGS84. The soil classification system used is mainly FAO-90.

The main fields of the soil property table include:

SU_SYM90 (the soil name in the FAO90 soil classification system);

SU_SYM85 (FAO85 classification);

T_TEXTURE (top soil texture);

DRAINAGE (19.5);

REF_DEPTH (soil reference depth);

AWC_CLASS (19.5);

AWC_CLASS (soil effective water content);

PHASE1: Real (soil phase);

PHASE2: String (soil phase);

ROOTS: String (depth classification with obstacles to the bottom of the soil);

SWR: String (soil moisture characteristics);

ADD_PROP: Real (a specific soil type related to agricultural use in the soil unit);

T_GRAVEL: Real (gravel volume percentage);

T_SAND: Real (sand content);

T_SILT: Real (silt content);

T_CLAY: Real (clay content);

T_USDA_TEX: Real (USDA soil texture classification);

T_REF_BULK: Real (soil bulk density);

T_OC: Real (organic carbon content);

T_PH_H2O: Real (pH)

T_CEC_CLAY: Real (cation exchange capacity of clay soil);

T_CEC_SOIL: Real (cation exchange capacity of soil)

T_BS: Real (basic saturation);

T_TEB: Real (exchangeable base);

T_CACO3: Real (carbonate or lime content)

T_CASO4: Real (sulfate content);

T_ESP: Real (exchangeable sodium salt);

T_ECE: Real (conductivity).

The attribute field beginning with T_ indicates the upper soil attribute (0-30cm), and the attribute field beginning with S_ indicates the lower soil attribute (30-100cm).

For the meaning of specific attribute values, please refer to the documentation * .pdf and database * .mdb in the folder.

Data file naming and use method

The data is stored in grid img, which can be read by ArcGIS, QGIS and other remote sensing software.

Required Data Citation View Data Cite Help About Data Citation
Cite as:

Food and Agriculture Organization of the United Nations(FAO), International Institute for Applied Systems Analysis. China soil map based harmonized world soil database (HWSD) (v1.1) (2009). National Tibetan Plateau Data Center, 2019. (Download the reference: RIS | Bibtex )

Related Literatures:

1. Fischer, G., Nachtergaele, F., Prieler, S., van Velthuizen, H.T., Verelst, L., & Wiberg, D. (2008). Global Agro-ecological Zones Assessment for Agriculture (GAEZ 2008). IIASA, Laxenburg, Austria and FAO, Rome, Italy.( View Details | Bibtex)

Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.

References literature

1.Zhang, Q., & Zhang, X.S. (2012). Impacts of predictor variables and species models on simulating Tamarix ramosissima distribution in Tarim Basin, northwestern China. Journal of Plant Ecology, 5(3), 337-345. doi:10.1093/jpe/rtr049 (View Details )

User Limit

To respect the intellectual property rights, protect the rights of data authors,expand servglacials of the data center, and evaluate the application potential of data, data users should clearly indicate the source of the data and the author of the data in the research results generated by using the data (including published papers, articles, data products, and unpublished research reports, data products and other results). For re-posting (second or multiple releases) data, the author must also indicate the source of the original data.

Example of acknowledgement statement is included below: The data set is provided by National Tibetan Plateau Data Center (

License: This work is licensed under an Attribution 4.0 International (CC BY 4.0)

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: Food and Agriculture Organization of the United Nations(FAO)   International Institute for Applied Systems Analysis  

Distributor: National Tibetan Plateau Data Center


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