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Table 3 Elevation precision of imagery derived post-earthquake DEM

From: Co-seismic landslide topographic analysis based on multi-temporal DEM—A case study of the Wenchuan earthquake

No. Longitude(°) Latitude(°) GPS_Elevation(m) DEM-Elevation(m) Error(m)
1 103.89948 31.34582 1390.878 1393.403 -2.525
2 103.96341 31.22905 876.761 874.376 2.385
3 104.02967 31.34853 798.949 799.126 -0.177
4 103.99306 31.27809 738.503 737.37 1.133
5 103.9768 31.35489 1090.177 1090.542 -0.365
6 104.53361 31.87152 599.059 598.938 0.121
7 104.22619 32.03414 1104.028 1103.25 0.778
8 104.35132 31.95228 1470.297 1467.909 2.388
9 104.4132 31.8329 942.5816 940.137 2.4446
10 104.58483 31.82802 571.4206 572.47 -1.0494
11 104.52359 31.778 806.9447 805.641 1.3037
12 103.942 31.31536 942.3366 946.256 -3.9194
  1. The elevation mean error is calculated to be ±1.5 m.
  2. Previous DEM precision check tables show the mean error of the pre-earthquake DEM is ±4.1 m, and median error is ±3.6 m; the mean error of the post-earthquake DEM is ±1.5 m, and mean elevation error is ±1.2 m.