Research Article
Spatiotemporal Variation Characteristics of Vegetative PUE in China from 2000 to 2015
Table 1
Accuracy comparison of the five interpolation methods.
| Interpolation method | Maximum (mm) | Minimum (mm) | Mean (mm) | Standard deviation (mm) | t-test | |
| IDW | 2686.0908 | 15.8132 | 567.8891 | 474.8156 | 0.2500 | 0.8043 | Spline | 8519.6455 | −2830.9712 | 560.7704 | 487.1202 | 0.0273 | 0.9784 | Trend | 4136.6260 | 114.0831 | 577.2636 | 448.7920 | 0.3870 | 0.7014 | Ordinary kriging | 2613.2412 | −28.6841 | 559.9145 | 476.0661 | 0.3520 | 0.7273 | Universal kriging | 2201.4834 | −932.9639 | 560.7932 | 472.1631 | 0.2088 | 0.8360 |
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