Geoscience Reference
In-Depth Information
Table 14.3
Differences of lengths and areas in DEM relief expression compared to expression in
maps (source: Voženílek, 2002b)
Length 100 m along
fall line [m]
Area 100
×
100 m [1 ha]
Slope (
◦
)
2
100.06
1.0006
5
100.38
1.0038
10
101.54
1.0154
15
103.52
1.0352
25
110.34
1.1034
35
122.08
1.2208
55
174.34
1.7434
Table 14.4
Deviations of basic statistical characteristics from the values of input points for tested
methods; example of flat highland (source: the authors)
Divácká vrchovina (flat highland)
Standard
deviation
[m]
Average
altitude [m]
Max.
altitude [m]
Min. altitude
[m]
Input points
284.060
29.340
220.000
385.000
Deviation from input points [m]
IDW
Max.
0.812
2.802
7.855
16.972
Min.
0.537
0.456
0.000
10.001
Regulated spline
Max.
1.034
3.499
10.562
9.113
Min.
0.967
3.302
3.165
8.848
Spline with tension
Max.
0.964
3.319
2.343
9.528
Min.
0.795
2.724
0.148
9.060
Table 14.5
Deviations of basic statistical characteristics from the values of input points for tested
methods; example of plain (source: the authors)
Žerotínská rovina (plain)
Average
altitude
[m]
Standard
deviation
[m]
Max.
altitude [m]
Min. altitude
[m]
Input points
251.713
3.840
245.000
260.000
Deviation from input points [m]
IDW (Inverse
Distance Weighting)
Max.
0.825
1.768
1.919
3.477
Min.
0.604
0.128
0.000
0.000
Regulated spline
Max.
0.877
0.400
0.149
0.585
Min.
0.802
0.275
0.000
0.000
Spline with tension
Max.
0.880
0.411
2.966
3.086
Min.
0.630
0.196
0.000
0.000
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