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netowrk, is considered by calculating both closeness and betweenness.
Therefore, closeness and betweenness properties perform better
.
4.2 Mesh density-based elimination to testing properties
Due to the reason that it's common for a mesh to have bounding road seg-
ments all with the same road class, properties except road class were used
to determine the importance of each stroke. In each elimination,
similarity
was calculated. Since some road segments (such as dead end roads or tree-
like road patterns) did not belong to a boundary of any mesh, their lengths
were not taken into consideration in calculation of the similarity.
4.2.1 Evaluation of similarity
Figure 5
: plot the relationships between the times to elimination and simi-
larities. The same as before, only the similarity compared with the corre-
sponding benchmark at 1:200,000 scale is list here.
length
Degree
1
1
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
0
200
400
600
800
1000
0
200
400
600
800
1000
Times to elimination
Times to elimination
Closeness
Betweenness
1
1
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
0
200
400
600
800
1000
0
200
400
600
800
1000
Times to elimination
Times to elimination
Figure 5:
The distributions of similarity by using four properties
