| City | Threshold | Extraction area (km2) | Statistical area (km2) | Relative error (%) |
| Wuhan | 62 | 514 | 534 | −0.0375 |
| Huangshi | 53 | 78 | 88 | −0.1136 |
| Daye | 56 | 18 | 27 | −0.3333 |
| Ezhou | 51 | 77 | 60 | 0.2833 |
| Huanggang | 53 | 50 | 47 | 0.0638 |
| Macheng | 48 | 27 | 27 | 0 |
| Wuxue | 48 | 23 | 24 | −0.0417 |
| Xiaogan | 51 | 63 | 62 | 0.0161 |
| Yingcheng | 47 | 46 | 46 | 0 |
| Anlu | 47 | 22 | 22 | 0 |
| Hanchuan | 47 | 26 | 26 | 0 |
| Xianning | 49 | 74 | 72 | 0.0278 |
| Chibi | 49 | 28 | 26 | 0.0769 |
| Xiantao | 45 | 67 | 67 | 0 |
| Tianmen | 42 | 79 | 80 | −0.0125 |
| Qianjiang | 50 | 55 | 50 | 0.10 |