Research Article
Study on Semantic Contrast Evaluation Based on Vector and Raster Data Patch Generalization
Table 1
Patch number, area change and semantic computation before and after generalization.
| ā | Patch number | Patch area | Semantic consistency | Semantic completeness | ā | Original data | Vector data | Raster data | Original data (hm2) | Vector data (hm2) | Raster data (hm2) | Vector data | Raster data | Vector data | Raster data |
| Cropland | 545 | 258 | 44 | 703.797 | 743.035 | 718.999 | 0.944 | 0.978 | 0.473 | 0.081 | Garden land | 434 | 176 | 62 | 629.161 | 629.257 | 644.396 | 1 | 0.976 | 0.406 | 0.143 | Forest land | 154 | 56 | 21 | 824.501 | 823.27 | 826.414 | 0.999 | 0.998 | 0.364 | 0.136 | Other agricultural lands | 41 | 11 | 8 | 41.711 | 46.554 | 28.382 | 0.884 | 0.68 | 0.268 | 0.195 | Urban land | 242 | 94 | 28 | 234.213 | 241.244 | 235.752 | 0.97 | 0.993 | 0.388 | 0.116 | Rural residential land | 171 | 86 | 41 | 430.688 | 444.607 | 462.983 | 0.968 | 0.925 | 0.503 | 0.24 | Mining land | 9 | 6 | 5 | 31.316 | 31.335 | 32.728 | 0.999 | 0.955 | 0.667 | 0.556 | Traffic and water conservancy land | 37 | 17 | 8 | 134.213 | 91.865 | 107.572 | 0.684 | 0.801 | 0.459 | 0.216 | Other construction lands | 6 | 3 | 3 | 40.743 | 40.415 | 40.181 | 0.992 | 0.986 | 0.5 | 0.5 | Water | 1 | 1 | 1 | 1.752 | 3.33 | 3.386 | 0.099 | 0.067 | 1 | 1 | Natural reserve land | 165 | 60 | 35 | 195.697 | 172.88 | 165.305 | 0.883 | 0.845 | 0.364 | 0.212 |
| Total | 1805 | 768 | 256 | 3267.792 | 3267.792 | 3266.096 | 1 | 0.999 | 0.425 | 0.142 |
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Note: all vector data and raster data are the statistical result of generalization of land use patch.
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