The soil moisture mapping was attempted by analysing observation data from several artificial satellites. Until now, only a few studies attemted a wide area mapping using satellite data. Clearly, the estimation of soil moisture in a wide area is important from a view point of water resources management. Therefore, we used the volumetric soil moisture as a criterion variable of the statistical estimation. The measurements of the volumetric soil moisture were carried out at the time synchronized with the satellite visit time. We used the backscattering coefficient of SAR data, the inclination of ground, the roughness of ground surface and the vegitation index as the predictor variables. These variables were caluculated on the basis of the geographical information of Digital National Land Information and multiple satellite data. Soil moisture mapping was conducted by using the results of multiple regression analysis between the mesurement of soil moisture and satellite data.
