[Objective] The objective of this project was to evaluate and compare spa- tial estimation accuracy by ordinary kriging and regression kriging with MODIS data, predicting SOM contents using limited available data in Shimen County, Hunan Province, China. [Method] Terrain parameters (derived from DEM) and Normalized differential vegetation index (NDVI), Land surface temperature (LST) (derived from MODIS data) were used as auxiliary data to predict the SOM spatial distribution. The mean error (ME) and mean square error (RMSE) were adop...