Table 6 Models fitted for factors obtained from principal component analysis and selecting the best interpolation method
Factors | Interpolation method | Model | Nugget | Partial sill | Sill | Mean range | Mean | Root mean square |
|---|---|---|---|---|---|---|---|---|
Factor 1 | Ordinary kriging | Exponential | 0 | 1.009 | 1.009 | 21035.1 | 0.027 | 0.853 |
Factor 2 | Radial basis functions | - | - | - | - | - | 0.015 | 1.003 |
Factor 3 | Radial basis functions | - | - | - | - | - | 0.001 | 0.874 |
Factor 4 | Radial basis functions | - | - | - | - | - | 0.002 | 0.785 |