The edge courses displayed in the schematic line diagram represent subsets of the vehicle journeys, more precisely the respective vehicle journey items, operating between the transfer nodes. The total set of vehicle journey items displayed in the schematic line diagram is based on the selected transfer nodes and vehicle journeys. This set is displayed through one or more edge courses between two transfer nodes, the number of edges resulting from the relevant start and end points of the edges of one of the following objects:
- all stops where boarding or alighting is permissible
- all stops with profile points
- all stops with route points
- all stops of the line route
- line route items with a specific attribute value
This allows you to realize different views of the timetable (passenger view, operation level). The number of edges between the two transfer nodes results from vehicle journey aggregation performed on a chosen aggregation level (Using Visum: Setting the layout for schematic line diagrams). Besides the 'typical' aggregation of the vehicle journeys based on the service pattern or lines between the transfer nodes, further aggregation levels can be chosen:
- Service trip pattnern number (=Trip pattern)
- Line directed / undirected
- Main line directed / undirected
- Line route
- Vehicle journey (no aggregation)
- Time profile
- Transport system directed / undirected
- Operator directed / undirected
Some aggregation levels distinguish between directed and undirected. This way you can control if one edge course each will be created between the transfer nodes or only one common edge course for both "running directions". In the case of the other aggregation levels which relate to vehicle journey-based attributes, an undirected display does not make sense; therefore only directed edge courses will be created.
For the aggregation by service trip pattern number, the respective input attribute will be used. It can either be determined manually, via the Calculate service trip patterns (Using Visum: Calculating service trip patterns)procedure or the respective Multi-edit functionality for vehicle journeys. There you will find the description of the algorithms for the calculation of the service trip patterns.
For edge courses, you can specify the standard graphic parameters for line objects. As a special feature, you can classify edge courses on two classification levels, for example to combine a display of the service frequency with the standard colors for specific lines. For the illustration of the service frequency in particular, several new line styles featuring up to four parallel lines can be selected (Using Visum: Setting graphic parameters for the schematic line diagram).
For coupled vehicle journey sections, you can display branches in the schematic line diagram. Furthermore, you can bundle edge courses manually. This way you can display supplies as such, where a headway of an hour can be achieved by an alternate service of a main section instead of lines operating with a headway of two hours with deviating destinations.
The edge courses can be labeled with attribute values at the start transfer node and end transfer node each and at the center of the course. For the transfer nodes, up to three attribute values can be used for the label within or at a chosen position outside of the rectangle.
For the classification and labels of the edge courses, some attributes aggregated from the data of the underlying vehicle journeys are available:
- Headway
- Departure and arrival times
- Number of stopovers
- Travel times
- Volumes
In addition, relations to vehicle journey items and to the opposite direction are available. They provide access to further aspects of the data model.
