北京城市热岛效应时空变化遥感分析
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杨敏, 杨贵军, 王艳杰, 张勇峰, 张智宏, 孙晨红
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Remote sensing analysis of temporal-spatial variations of urban heat island effect over Beijing
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Min YANG, Guijun YANG, Yanjie WANG, Yongfeng ZHANG, Zhihong ZHANG, Chenhong SUN
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表2 7期Landsat影像中各覆盖类别最小/最大/平均LST及面积比例
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Tab.2 Minimum / maximum / average of LST and area ratio for classes of coverage in Landsat images acquired in seven periods
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覆盖类别 | LST | 1985年 | 1991年 | 1995年 | 2001年 | 2005年 | 2011年 | 2015年 | 7期平均 | 水体 | 最低/K | 287.87 | 290.99 | 284.80 | 283.63 | 293.55 | 296.20 | 296.86 | 290.56 | 最高/K | 302.09 | 305.36 | 298.92 | 300.11 | 304.34 | 312.18 | 307.72 | 304.39 | 平均/K | 295.19 | 295.95 | 292.02 | 292.07 | 297.91 | 299.34 | 299.75 | 296.03 | 面积比例/% | 0.57 | 0.74 | 0.62 | 0.73 | 0.75 | 0.75 | 0.68 | 0.69 | 高大植被 | 最低/K | 286.45 | 290.61 | 284.62 | 282.90 | 292.94 | 293.76 | 293.74 | 289.29 | 最高/K | 303.09 | 308.85 | 303.76 | 301.84 | 308.67 | 310.90 | 310.81 | 306.85 | 平均/K | 295.70 | 297.69 | 293.60 | 293.86 | 298.73 | 300.58 | 301.55 | 297.39 | 面积比例/% | 22.91 | 23.79 | 33.16 | 27.57 | 24.45 | 24.87 | 6.38 | 23.30 | 低矮植被 | 最低/K | 286.50 | 290.25 | 287.60 | 282.38 | 291.35 | 294.75 | 293.10 | 289.42 | 最高/K | 303.14 | 308.46 | 299.34 | 302.55 | 305.80 | 310.59 | 312.73 | 306.09 | 平均/K | 295.62 | 297.08 | 292.91 | 293.11 | 298.29 | 300.23 | 302.04 | 297.04 | 面积比例/% | 30.72 | 8.06 | 31.09 | 18.62 | 30.88 | 27.50 | 35.22 | 26.01 | 裸土 | 最低/K | 281.98 | 291.87 | 289.32 | 282.37 | 293.25 | 294.69 | 295.34 | 289.83 | 最高/K | 305.98 | 310.11 | 301.18 | 306.51 | 310.28 | 314.42 | 315.11 | 309.08 | 平均/K | 296.84 | 299.07 | 294.23 | 294.68 | 300.25 | 302.40 | 304.25 | 298.82 | 面积比例/% | 34.67 | 46.59 | 14.90 | 24.13 | 14.91 | 11.01 | 16.09 | 23.19 | 不透水面 | 最低/K | 277.24 | 290.72 | 283.12 | 275.15 | 289.90 | 292.51 | 293.86 | 286.07 | 最高/K | 308.72 | 315.46 | 311.19 | 309.09 | 313.24 | 317.51 | 316.18 | 313.05 | 平均/K | 298.16 | 300.65 | 294.93 | 295.02 | 301.22 | 304.06 | 305.47 | 299.93 | 面积比例/% | 11.13 | 20.82 | 20.23 | 28.95 | 29.02 | 35.87 | 41.64 | 26.81 | 分类精度 | OA/% | 96.04 | 95.98 | 95.26 | 92.25 | 94.07 | 92.02 | 93.46 | 94.16 | Kappa | 0.95 | 0.95 | 0.94 | 0.90 | 0.92 | 0.90 | 0.92 | 0.93 |
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