| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Earth | 1008 | 
                                    
                                    42%
                                 | 
| 2 | Gravel | 224 | 
                                    
                                    9.3%
                                 | 
| 3 | Stone | 8 | 
                                    
                                    0.3%
                                 | 
| 4 | Muram | 24 | 
                                    
                                    1%
                                 | 
| 5 | Paved/ Tarred | 1120 | 
                                    
                                    46.7%
                                 | 
| 6 | Concrete | 16 | 
                                    
                                    0.7%
                                 |