The source data of this data set comes from the 1:1 million soil map of China (Shi et al., 2004) and 8595 soil sections in the second Soil Census. The polygonal connection method is used to connect the soil profile with the soil map to obtain the soil sand, silt and clay content map. The distance between the profile and the map spot, the number of soil profiles and the information of soil classification are taken into account. Data characteristics
Projection: GCS? Krasovsky? 1940
Coverage: China
Resolution: 0.00833 degrees (about one kilometer)
Data format: FLT, tiff
Value range: 0% - 100%
Document description
Floating point grid files include:
Sand1.flt, clay1.flt - content of sand and clay in the surface layer (0-30cm).
Sand2.flt, clay2.flt - sand and clay content in the bottom layer (30-100cm).
Psd.hdr – header file:
Ncols - number of columns
Nrows - number of rows
Xllcorner - lower left latitude
Yllcorner - lower left longitude
Cellsize - cell size
NoData? Value - null
byteorder - LSBFIRST, Least Significant Bit First
TIFF grid files include:
Sand 1.tif, clay 1.tif - the content of sand and clay in the surface layer (0-30cm).
Sand 2.tif, clay 2.tif - sand and clay content in the bottom layer (30-100cm).
Data from the 1:1 million soil map of China (Shi et al., 2004) and 8595 soil profiles from the second Soil Census
Digital Vectorization
Good data quality
| # | number | name | type |
| 1 | 2008DFA22180 | International cooperation project of Ministry of science and technology | |
| 2 | GYHY201206013 | other | |
| 3 | 40875062 | National Natural Science Foundation of China | |
| 4 | 41205037 | The National Science Fund for Distinguished Young Scholars | |
| 5 | GYHY200706025 | other | |
| 6 | 40225013 | The National Science Fund for Distinguished Young Scholars |
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