<trans-title>Elevation Accuracy Evaluation and Correction of SRTM and ASTER GDEM in Shandong Province based on ICESat/GLAS</trans-title>

Table 1. Statistics of ICESat/GLAS and elevation errors
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Table 1. Statistics of ICESat/GLAS and elevation errors
DEM 点数/个最大值/m 最小值/m 平均值/m 标准差/m 均方差/m
SRTM 335 716 47.92 -47.83 -0.25 5.57 5.57
ASTER 328 366 47.94 -47.65 0.08 7.20 7.20

Table 2. Accuracy statistics under different land types in Shandong Province (m)
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Table 2. Accuracy statistics under different land types in Shandong Province (m)
土地覆盖类型 SRTM 均方差 ASTER GDEM 均方差
农田 4.13 5.15
灌丛 5.02 6.32
森林 8.52 11.35
草地 5.72 6.87
湿地 7.21 9.54
水体 7.05 9.07

Table 3. Accuracy statistics of SRTM under different slopes

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Table 3. Accuracy statistics of SRTM under different slopes

坡度/°	点数/个	最大值/m	最小值/m	平均值/m	标准差/m	均方差/m
0~5	296 699	99.91	-95.60	0.32	4.40	4.40
5~10	18 631	99.44	-60.26	0.12	12.48	12.48
10~15	8 365	98.03	-91.48	0.60	19.00	19.01
15~20	3 752	99.74	-85.74	0.96	24.08	24.08
20~25	1 107	78.73	-79.00	1.21	29.16	29.17
25~30	193	97.94	-82.80	5.12	33.08	33.17
30~35	30	74.47	-72.86	-8.70	39.10	39.77

Table 4. Accuracy statistics of ASTER GDEM under different slopes

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Table 4. Accuracy statistics of ASTER GDEM under different slopes

坡度/°	点数/个	最大值/m	最小值/m	平均值/m	标准差/m	均方差/m
0~5	204 513	99.42	-86.30	-0.10	6.61	6.61
5~10	90 474	99.95	-97.83	0.37	8.40	8.40
10~15	21 270	98.96	-69.38	0.72	10.93	10.93
15~20	7 260	97.74	-91.60	0.54	12.83	12.83
20~25	3 222	99.56	-81.74	-0.47	13.85	13.85
25~30	1 362	78.97	-86.13	-1.45	15.93	15.94
30~35	445	59.58	-56.38	-1.09	17.64	17.66
35~40	135	84.85	-59.74	-3.64	23.59	23.68
40~45	23	62.67	-55.10	-9.58	21.72	22.21

Table 5. Accuracy Analysis of SRTM and ASTER GDEM using Interpolation Correction (m)
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Table 5. Accuracy Analysis of SRTM and ASTER GDEM using Interpolation Correction (m)
插值方法 SRTM 均方差 ASTER GDEM 均方差
反距离加权 2.20 5.31
地形转栅格 2.57 5.47
自然邻域法 2.70 5.56
普通克里金 4.74 5.93

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Chenchen QIN, Chuanfa CHEN, Na YANG, Yuan GAO, Mengying WANG. Elevation Accuracy Evaluation and Correction of SRTM and ASTER GDEM in Shandong Province based on ICESat/GLAS[J]. Journal of Geo-information Science, 2020, 22(3): 351

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Paper Information

Received: Jul. 30, 2019

Accepted: --

Published Online: Sep. 16, 2020

The Author Email: Chuanfa CHEN (chencf@lreis.ac.cn)

DOI:10.12082/dqxxkx.2020.190411

Topics

Table 1. Statistics of ICESat/GLAS and elevation errors

Table 1. Statistics of ICESat/GLAS and elevation errors

Table 2. Accuracy statistics under different land types in Shandong Province (m)

Table 2. Accuracy statistics under different land types in Shandong Province (m)

Table 3. Accuracy statistics of SRTM under different slopes

Table 3. Accuracy statistics of SRTM under different slopes

Table 4. Accuracy statistics of ASTER GDEM under different slopes

Table 4. Accuracy statistics of ASTER GDEM under different slopes

Table 5. Accuracy Analysis of SRTM and ASTER GDEM using Interpolation Correction (m)

Table 5. Accuracy Analysis of SRTM and ASTER GDEM using Interpolation Correction (m)