Home » Projects » Rangeland Soil Management and Hydrology » Watershed-scale Hydropedology » Hydrologic Modeling in Oak Woodland Soilscapes » SFREC » Elevation Survey by RTK » Establishing the Optimal Number of Survey Points » Selection by Minimizing MAE (mean absolute error)

Selection by Minimizing MAE (mean absolute error)

  • 5 meter interval sampling of contours
  • 5 meter interval sampling of terrain skeleton
  • [5 10 15 20 25 30 40 50 60] meter thinning (snapping) radius

MAE vs. Thinning radius: terrain skeleton approach in red
MAE vs. Thinning radius: terrain skeleton approach in red



    
    





    



 thinningpointsinterp_pointsmaerand_mae



1
5
3375
3318
0.59
0.12




2
10
1730
1693
0.60
0.28




3
15
1058
1040
0.60
0.41




4
20
698
691
0.66
0.57




5
25
501
495
0.67
0.76




6
30
381
379
0.76
1.03




7
40
231
227
0.91
1.89




8
50
152
150
1.17
2.15




9
60
117
117
1.35
2.61