Finds the connected lines that belong to the same network graph.

Network Topology in FME

In order to successfully generate a network topology, some conditions must be met.

  • Lines must touch (be snapped) at an end vertex - first or last.

  • Lines must be split at junctions. The TopologyBuilder can automate this process, but will not consider z-values (and so may not produce correct results for overpasses/underpasses, for example.)

  • A junction at an interior vertex (not an end vertex) produces a complex edge, which is not supported.


Input Ports

Output Ports


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.

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters. There are a number of tools and shortcuts that can assist in constructing values, generally available from the drop-down context menu adjacent to the value field.

Dialog Options - Tables

Transformers with table-style parameters have additional tools for populating and manipulating values.

Transformer History

This transformer has been renamed from NetworkTopologyBuilder.

Keywords: Network, NetworkTopologyBuilder

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Keywords: network networktopologybuilder