• Journal of Geo-information Science
  • Vol. 22, Issue 3, 351 (2020)
Chenchen QIN1、1, Chuanfa CHEN1、1、*, Na YANG2、2, Yuan GAO1、1, and Mengying WANG1、1
Author Affiliations
  • 1College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
  • 1山东科技大学测绘科学与工程学院,青岛 266590
  • 2Jinan Geotechnical Investigation and Surveying Institute, Ji'nan 250101, China
  • 2济南市勘察测绘研究院,济南 250101
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    DOI: 10.12082/dqxxkx.2020.190411 Cite this Article
    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 Copy Citation Text show less
    Distribution of ICESat/GLAS in Shandong Province
    Fig. 1. Distribution of ICESat/GLAS in Shandong Province
    Flow chart of accuracy assessment and correction of SRTM and ASTER
    Fig. 2. Flow chart of accuracy assessment and correction of SRTM and ASTER
    Error distributions of SRTM and ASTER GDEM
    Fig. 3. Error distributions of SRTM and ASTER GDEM
    Comparison of SRTM error surfaces based on four interpolation methods
    Fig. 4. Comparison of SRTM error surfaces based on four interpolation methods
    Comparison of ASTER GDEM error surfaces based on four interpolation methods
    Fig. 5. Comparison of ASTER GDEM error surfaces based on four interpolation methods
    Original SRTMs and ASTERs, and their improved versions
    Fig. 6. Original SRTMs and ASTERs, and their improved versions
    DEM点数/个最大值/m最小值/m平均值/m标准差/m均方差/m
    SRTM335 71647.92-47.83-0.255.575.57
    ASTER328 36647.94-47.650.087.207.20
    Table 1. Statistics of ICESat/GLAS and elevation errors
    土地覆盖类型SRTM 均方差ASTER GDEM 均方差
    农田4.135.15
    灌丛5.026.32
    森林8.5211.35
    草地5.726.87
    湿地7.219.54
    水体7.059.07
    Table 2. Accuracy statistics under different land types in Shandong Province (m)
    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
    0~5296 69999.91-95.600.324.404.40
    5~1018 63199.44-60.260.1212.4812.48
    10~158 36598.03-91.480.6019.0019.01
    15~203 75299.74-85.740.9624.0824.08
    20~251 10778.73-79.001.2129.1629.17
    25~3019397.94-82.805.1233.0833.17
    30~353074.47-72.86-8.7039.1039.77
    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
    0~5204 51399.42-86.30-0.106.616.61
    5~1090 47499.95-97.830.378.408.40
    10~1521 27098.96-69.380.7210.9310.93
    15~207 26097.74-91.600.5412.8312.83
    20~253 22299.56-81.74-0.4713.8513.85
    25~301 36278.97-86.13-1.4515.9315.94
    30~3544559.58-56.38-1.0917.6417.66
    35~4013584.85-59.74-3.6423.5923.68
    40~452362.67-55.10-9.5821.7222.21
    Table 4. Accuracy statistics of ASTER GDEM under different slopes
    插值方法SRTM 均方差ASTER GDEM 均方差
    反距离加权2.205.31
    地形转栅格2.575.47
    自然邻域法2.705.56
    普通克里金4.745.93
    Table 5. Accuracy Analysis of SRTM and ASTER GDEM using Interpolation Correction (m)
    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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