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Table 2 Elevation precision of topographic map derived pre-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

106.023

32.9621

616.749

620.08234

3.3333364

2

105.457

32.0184

678.851

682.28235

3.4313486

3

103.435

32.9307

3587.7

3583.9824

-3.7175781

4

102.501

32.7856

3471.93

3462.3823

-9.5476758

5

104.571

32.4053

1312.77

1312.4823

-0.2877002

6

104.831

32.1819

1068.06

1064.7823

-3.2776514

7

104.444

31.8019

1002.18

1002.1824

0.0023731

8

103.166

32.075

2957.83

2948.6824

-9.1476269

9

104.782

31.4865

489.381

484.88232

-4.4986758

10

104.187

31.3529

571.82

571.2334

-0.5866016

11

104.441

31.1571

483.26

484.68231

1.422312

12

104.077

30.732

490.226

494.68231

4.456312

13

103.41

30.415

559.666

550.9823

-8.6837002

14

106.034

30.8042

295.216

299.77786

4.5618625

  1. The mean elevation error is calculated to be ±4.1 m.