| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Earth | 40 | 
                                    
                                    3.3%
                                 | 
| 2 | Gravel | 448 | 
                                    
                                    37.3%
                                 | 
| 3 | Stone | 16 | 
                                    
                                    1.3%
                                 | 
| 4 | Muram | 0 | 
                                    
                                    0%
                                 | 
| 5 | Paved/ Tarred | 696 | 
                                    
                                    58%
                                 | 
| 6 | Concrete | 0 | 
                                    
                                    0%
                                 | 
| 7 | None of above | 0 | 
                                    
                                    0%
                                 |