In the course fundamentals, some of the history and theoretical underpinnings of DSM was discussed. Now with a solid foundation in R, it is time to put this all into practice i.e. do DSM with R. In the DSM preparation pages you were introduced to common steps need to get data in a format ready for spatial modelling. The implementation of some of the most commonly used model functions used for digital soil mapping will be covered in this section of pages. A few general concepts around assessing model fitness and validation need some covering first, but if you already comfortable about these, then jump straight into the looking at and fitting models.