Table 5 The accuracy comparison of different methods.
From: A data set of global river networks and corresponding water resources zones divisions
Continent | The mean deviation distance from generated rivers to the center points of real rivers (m) | ||||
|---|---|---|---|---|---|
River level | This study | HDMA | Difference | Difference in percent | |
Mean of all continent | 1 | 176.73 | 570.58 | 393.85 | 69% |
2 | 119.07 | 515.97 | 396.89 | 77% | |
3 | 108.13 | 450.24 | 342.12 | 76% | |
4 | 125.18 | 490.52 | 365.34 | 74% | |
Mean of all levels | 132.28 | 506.83 | 374.55 | 74% | |
South America | 1 | 65.93 | 866.14 | 800.21 | 92% |
2 | 71.41 | 670.75 | 599.34 | 89% | |
3 | 55.13 | 326.11 | 270.98 | 83% | |
4 | 63.86 | 420.24 | 356.38 | 85% | |
North America | 1 | 234.33 | 377.33 | 142.99 | 38% |
2 | 106.68 | 411.08 | 304.39 | 74% | |
3 | 135.54 | 198.22 | 62.67 | 32% | |
4 | 98.58 | 243.90 | 145.32 | 60% | |
Europe | 1 | 128.90 | 305.78 | 176.88 | 58% |
2 | 110.79 | 539.31 | 428.53 | 79% | |
3 | 117.06 | 735.84 | 618.78 | 84% | |
4 | 95.10 | 655.71 | 560.61 | 85% | |
Africa | 1 | 364.93 | 935.81 | 570.88 | 61% |
2 | 184.89 | 610.68 | 425.79 | 70% | |
3 | 102.32 | 668.20 | 565.88 | 85% | |
4 | 217.21 | 661.89 | 444.68 | 67% | |
Asia | 1 | 228.73 | 850.46 | 621.72 | 73% |
2 | 112.63 | 590.73 | 478.10 | 81% | |
3 | 130.62 | 569.97 | 439.35 | 77% | |
4 | 196.17 | 750.87 | 554.69 | 74% | |
Oceania | 1 | 37.58 | 87.96 | 50.38 | 57% |
2 | 128.04 | 273.24 | 145.20 | 53% | |
3 | 108.10 | 203.13 | 95.04 | 47% | |
4 | 80.16 | 210.50 | 130.34 | 62% | |
