Environmental variables

Resolution

Data sources

Climate

Precipitation

1 km

State Key Laboratory of Resource and Environmental Information System, IGSNRR, CAS

Temperature

Relative humility

Parent material

Parent material type

1 km

Rasterized from Chinese Geology Map (1:1000,000)

Topography

Altitude

90 m

Original DEM was downloaded from SRTM website and derived indexes were generated based on either ArcGIS or specific algorithms

Slope gradient

Aspect

Profile curvature

Plane curvature

Surface area ratio, SAR

Topographical wetness index, TWI

Geomorphology

Geomorphologic type (genesis type of geomorphology)

1 km

State Key Laboratory of Resources and Environmental Information System, IGSNRR, CAS