NetworkTopologyCalculator

Network lines

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.

All connected lines are output through the Network port.

All non-linear features are output through the <Rejected> 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.

No: This is the default behavior. Processing will only occur in this transformer once all input is present.

By Group: 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.

Linear input features that are connected will be assigned the same network ID in the Network ID Attribute.