Data Type: Temporal Spatial Graph ()

Description:

A temporal spatial graph is a specialization of Spatial Graph. This data type is organized as a graph with a notion of time steps and tracks. Branching or endpoints of the network are called Events, the curved lines (arcs) connecting events are called Segments. The three dimensional course of a segment is given by a sequence of Steps in 3D space. A set of segments connected by events will be termed a Track, and a Temporal Spatial Graph data object can store several tracks.

Some properties are associated to each track, segment, node and point.

Properties on track:

• Track ID: The ID of the track.
• Begin Time Step: The time step of the begin track.
• End Time Step: The time step of the end track.
• Segments IDs: The list of segments which compose the track.

Properties on segment:

• Segment ID: The ID of the segment.
• Begin Time Step: The time step of the begin segment.
• End Time Step: The time step of the end segment.
• Track ID: The ID of the parent track.
• Event ID #1: The begin event of the segment.
• Event ID #2: The end event of the segment.
• Step IDs: The liste of steps which compose the segment.

Properties on event:

• Event ID: The ID of the event.
• Time Step: The time step of the event.
• Event Type: The type of the event which can be appearance, disapearance, split or merge.
• X Coord: The x coordinate of the event.
• Y Coord: The y coordinate of the event.
• Z Coord: The z coordinate of the event.
• Coordination Number: The number edge which merge on this event.

Properties on step:

• Event ID: The ID of the step.
• Time Step: The time step of the step.
• X Coord: The x coordinate of the step.
• Y Coord: The y coordinate of the step.
• Z Coord: The z coordinate of the step.

All properties data are displayed in the spreadsheet which is accessible using the Table port. Instead of displaying three tables like Spatial Graph, there are four tables: one for the Tracks, one for the Segments, one for the Events and one for the Steps.

In order to visualize the network of a Temporal Spatial Graph object the module Track View can be used. This data type can be saved or loaded from the file format.

A spreadsheet displaying the information which can be found in the Temporal Spatial Graph is accessible using the Show button from the Table port. Four tables are displayed, one for each graph elements: Events, Steps, Segments and tracks. Each tab contains all information concerning the elements of the temporal spatial graph. This spreadsheet can be exported in Microsoft XML SpreadSheet 2003 format, using the Export as... button.

Ports:

See the documentation of Spatial Graph.