藏东南波堆藏布江流域古乡冰期冰川重建
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覃长雄,许刘兵,谢金明,周尚哲
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Glacier reconstruction of the Guxiang Glaciation in the Bodui Zangbo Valley in southeastern Tibet
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Changxiong QIN,Liubing XU,Jinming XIE,Shangzhe ZHOU
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表4 不同空间插值方法得到的古冰面高程精度对比
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Table 4 Precision comparison of paleo-glacier surface elevation estimated from different spatial interpolation methods
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编号 | 实测高程/m | 高程插值/m | 绝对误差/m | 相对误差/% |
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IDW | UK | OK | IDW | UK | OK | IDW | UK | OK |
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1 | 2 678.742 | 2 678.072 | 3 025.929 | 2 956.566 | 0.67 | 347.19 | 277.82 | 0.025 | -12.961 | -10.371 | 2 | 2 705.931 | 2 706.710 | 2 923.167 | 2 882.967 | 0.78 | 217.24 | 177.04 | -0.029 | -8.028 | -6.543 | 3 | 2 718.123 | 2 719.080 | 2 834.148 | 2 811.306 | 0.96 | 116.03 | 93.18 | -0.035 | -4.269 | -3.428 | 4 | 2 734.359 | 2 733.184 | 2 911.702 | 2 881.433 | 1.18 | 177.34 | 147.07 | 0.043 | -6.486 | -5.379 | 5 | 2 753.043 | 2 753.531 | 2 753.087 | 2 753.087 | 0.49 | 0.04 | 0.05 | -0.018 | -0.002 | -0.002 | 6 | 2 776.828 | 2 776.500 | 2 980.947 | 2 946.629 | 0.33 | 204.12 | 169.80 | 0.012 | -7.351 | -6.115 | 7 | 2 783.399 | 2 783.711 | 2 971.017 | 2 940.639 | 0.31 | 187.62 | 157.24 | -0.011 | -6.741 | -5.649 | 8 | 2 791.636 | 2 790.393 | 2 871.972 | 2 859.999 | 1.24 | 80.34 | 68.36 | 0.044 | -2.878 | -2.449 | 9 | 2 813.275 | 2 813.493 | 2 920.051 | 2 909.309 | 0.22 | 106.78 | 96.03 | -0.007 | -3.796 | -3.413 | 10 | 3 889.426 | 3 885.117 | 3 991.450 | 3 989.136 | 4.31 | 102.02 | 99.71 | 0.111 | -2.623 | -2.564 |
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