This content shows how to create a digital elevation model using GNSS data and create a 3D model.

1. Center for Research and Application for Satellite Remote Sensing
Yamaguchi University
DEM Generation Using GNSS Data (6)

2. https://www.youtube.com/watch?v=TNhxv6YwDwc&t=180s

3. 1) Static positioning – Ground Control Point locations
2) Kinematic positioning – Moving locations for DEM
creation
GNSS post-processing data

4. GCP Lat Lon h
1 33.949500022 131.283332839 22.3647
2 33.948999088 131.283790974 22.4500
3 33.948995632 131.283256047 22.4745
4 33.948402646 131.283216261 22.5926
5 33.948460502 131.282925275 26.6895
6 33.948501222 131.282331301 29.6430
7 33.948243499 131.282248236 30.0348
8 33.948214391 131.281819064 30.2664
9 33.947912578 131.282288868 30.1060
10 33.948097392 131.282656049 29.5968
Y/North X/East

5. GNSS survey data
GNSS survey data
Receiver Height subtract person height

6. CSV to point

8. DEM (Point) 1

9. DEM (Point) 2

10. DEM (Point) 3

11. DEM (Point) 4

12. Merge all points

15. Check your merged points and change color

16. Remove some overlap points and
different elevation in the same area

19. Use the layer extent

20. Change these parameters

22. Distance coefficient P = 2
Pixel size = 0.00001
Distance coefficient P = 5
Pixel size = 0.00001
Distance coefficient P = 15
Pixel size = 0.00001
Best Parameter

26. Open New 3D Map View

29. Overlay google earth image on the top
To control 3D viewer
CTRL
(rotate)
mouse