Fixes the flow (direction) of each edge or linear feature in the network to fit the downstream direction to the destination node.
Input Line features must be a topologically noded network with features connecting at line ends only. That is, all features must be split at junctions.
Only one destination node is allowed for each group.
All connected features are output through the Network port.
All edges or linear features not connected to the destination node are output through the Unused port.
All non-linear features or extra destination nodes are output through the Invalid port.
The default behavior is to use the entire set of features as the group. This option allows you to select attributes that define which groups to form.
Note: How parallel processing works with FME: see About Parallel Processing for detailed information.
This parameter determines whether or not the transformer should perform the work across parallel processes. If it is enabled, a process will be launched for each group specified by the Group By parameter.
Parallel Processing Levels
For example, on a quad-core machine, minimal parallelism will result in two simultaneous FME processes. Extreme parallelism on an 8-core machine would result in 16 simultaneous processes.
You can experiment with this feature and view the information in the Windows Task Manager and the Workbench Log window.
Yes: This transformer will process input groups in order. Changes on the value of the Group By parameter on the input stream will trigger batch processing on the currently accumulating group. This will improve overall speed if groups are large/complex, but could cause undesired behavior if input groups are not truly ordered.
No: This is the default behavior. Processing will only occur in this transformer once all input is present.
If an edge is reversed, the value of the attribute specified in Direction Attribute will be opposite. Otherwise, the value will be same.
The functionality works well in a non-cycle network; however, it does not always yield desired results in a cycle network. One way to fix a cycle network is to omit edges that should not be modified from the input.
Editing Transformer Parameters
Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.
FME Licensing Level
FME Professional edition and above
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Tags Keywords: NetworkFlowSetter