| Value | Category | Cases | |
|---|---|---|---|
| no clear field | 7 |
1.3%
|
|
| ok | 490 |
92.3%
|
|
| ok, only one corner | 6 |
1.1%
|
|
| residential area, no field | 24 |
4.5%
|
|
| road, no field | 1 |
0.2%
|
|
| water (river, pont, lake, ocean, ...), no field | 3 |
0.6%
|