Geoscience Reference
In-Depth Information
(a)
100
90
80
70
(b)
95
103
103
104
104
105
105
105
104
103
103
86
91
95
95
97
100
102
103
103
103
100
78
80
82
84
84
90
95
100
103
100
95
71
72
72
70
78
86
86
95
96
95
86
69
69
67
68
75
80
82
84
84
82
80
69
66
68
69
70
72
75
76
78
77
76
(c)
Figure 3.3
Digital representations of topography: (a) vector representation of contour lines; (b) raster grid
of point elevations; (c) triangular irregular network representation.
