A class containing predictions of target soil property at six standard depths following the GlobalSoilMap.net specifications: sd1 = 2.5 cm (0--5), sd2 = 10 cm (5--15), sd3 = 22.5 cm (15--30), sd4 = 45 cm (30--60), sd5 = 80 cm (60--100), sd6 = 150 cm (100--200).
varname:object of class "character"; abbreviated variable name registered in the Global Soil Data registry
TimeSpan:object of class "list"; contains begin and end of the sampling period of class "POSIXct"
sd1:object of class "SpatialPixelsDataFrame"; predictions and variances, or number of realizations of the target variable at depth 2.5 cm (0--5)
sd2:object of class "SpatialPixelsDataFrame"; predictions and variances, or number of realizations of the target variable at depth 10 cm (5--15)
sd3:object of class "SpatialPixelsDataFrame"; predictions and variances, or number of realizations of the target variable at depth 22.5 cm (15--30)
sd4:object of class "SpatialPixelsDataFrame"; predictions and variances, or number of realizations of the target variable at depth 45 cm (30--60)
sd5:object of class "SpatialPixelsDataFrame"; predictions and variances, or number of realizations of the target variable at depth 80 cm (60--100)
sd6:object of class "SpatialPixelsDataFrame"; predictions and variances, or number of realizations of the target variable at depth 150 cm (100--200)
Hartemink, A. E., Hempel, J., Lagacherie, P., McBratney, A., McKenzie, N., MacMillan, R. A., ... & Zhang, G. L. (2010). GlobalSoilMap.net --- A New Digital Soil Map of the World. In Digital Soil Mapping (pp. 423--428). Springer Netherlands.
Sanchez, P. A., S. Ahamed, F. Carre, A. E. Hartemink, J. Hempel, J. Huising, P. Lagacherie, A. B. McBratney, N. J. McKenzie, M L. de Mendon<U+00E7>a-Santos, et al., (2009) Digital Soil Map of the World. Science, 325(5941): 680--681.