Research Article
Research on Ecoenvironmental Quality Evaluation System Based on Big Data Analysis
Table 7
Statistical table of dryness index of remote sensing data in each period.
| | Dryness index | Minimum value | Maximum value | Mean value | Standard deviation |
| | 1991 | 0.00 | 1.00 | 0.477 | 0.050 | | 2000 | 0.00 | 1.00 | 0.458 | 0.0459 | | 2004 | 0.00 | 1.00 | 0.623 | 0.077 | | 2010 | 0.00 | 1.00 | 0.470 | 0.052 | | 2013 | 0.00 | 1.00 | 0.445 | 0.055 | | 2018 | 0.00 | 1.00 | 0.434 | 0.058 | | 2019 | 0.00 | 1.00 | 0.432 | 0.058 |
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