Method | Signal factor analysis | PCA | Voronoi Area Weighting Factor Method | |||
Class | III | IV | III | IV | III | IV |
Sample points | 11 | 53 | 59 | 6 | 13 | 51 |
Percentage | 3.2 | 74.5 | 70.3 | 29.7 | 23.7 | 76.3 |