Geography Reference
In-Depth Information
100
100
90
90
80
80
70
70
60
60
50
50
40
40
scale 12
scale 13
scale 14
scale 15
scale 16
scale 17
scale 18
scale 19
scale 12
scale 13
scale 14
scale 15
scale 16
scale 17
scale 18
scale 19
30
30
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
% cached objects
% cached objects
(a) Scale 12
(b) Scale 13
100
100
90
90
80
80
70
70
60
60
50
50
40
40
scale 12
scale 13
scale 14
scale 15
scale 16
scale 17
scale 18
scale 19
scale 12
scale 13
scale 14
scale 15
scale 16
scale 17
scale 18
scale 19
30
30
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
% cached objects
% cached objects
(c) Scale 14
(d) Scale 15
 
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