Geospatial Analysis and Modelling of Urban Structure and Dynamics by Bin Jiang & Xiaobai Yao

Author:Bin Jiang & Xiaobai Yao
Language: eng
Format: epub
Publisher: Springer Netherlands, Dordrecht

Bus Routes

The bus routes are modeled as linear features in a line feature class. The bus routes share the same geometry as the underlying street network. Thus line features representing bus routes are geometrically coincident with line features representing streets. This requires special topological relationships to be maintained between features of these two feature classes so that the geometrical edits made to one feature are also reflected in another feature to maintain referential integrity of the data. This can be achieved by using coincidence-based topological feature editing tools such as map topology in ArcGIS (ESRI 2006).

Bus service occurs only along predefined routes, while boarding, alighting, and transfer between routes are possible only at fixed bus stops. Moreover, two bus routes can share some or all the street segments; bus services serve the designated bus stops in a pre-determined order. A prudent method to model such behavior is to represent each bus route in a separate line feature class made up of street segments that define the route geometry. The stop sequence on the route can be modeled by restriction-based network attributes similar to those used to model one-way streets. For example to model a sequence of stops along a route, the route can be treated as being traversable only in the direction that gives the scheduled stop sequence and by treating all other edges as restricted, as shown in Fig. 11.4.

Fig. 11.4Modeling the stop sequence along bus routes

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.