Geoscience Reference
In-Depth Information
3.2 Experimental data
The digitized road network of Hong Kong Island is used as the experimen-
tal data (see
figure 1
). Original road segments represented by double-lines
were collapsed into single lines. Road class (including main road and
secondary road) and road name were manually added to each road segment
according to the available thematic attributes in the database.
Figure 1:
The road network of Hong Kong Island
3.3 Experimental approaches
Selective omission operator is implemented to check whether important
individual roads within a road network can be retained. To be specific, in
the experiment, two representative selective omission approaches, i.e.
stroke-based selection and mesh density-based elimination are used.
Following is a brief introduction of these two approaches.
