FME Transformers: 2024.1

Calculated Values
Filters and Joins


Combines feature geometries into heterogeneous or homogeneous aggregates. Alternatively, combines feature attributes without any geometry.

Features are aggregated in the order they are received by this transformer. If the order of individual geometry parts within the resulting aggregate is important, you can first route the features through a Sorter.

Feature geometries and attributes can also be deaggregated using a similar transformer, the Deaggregator.


Geometric Representation

The example below illustrates a geometric feature of diverse attributes on the left and its aggregated output on the right.

Data Structure Representation

The example below illustrates a set of points representing a non-aggregated data structure on the left and its corresponding aggregated output on the right.

Usage Notes

  • This transformer will not dissolve adjacent area boundaries – it simply creates a collection of all that it is given. Use the Dissolver if adjacent areas are to be merged into a single area.



Editing Transformer Parameters

Transformer parameters can be set by directly entering values, using expressions, or referencing other elements in the workspace such as attribute values or user parameters. Various editors and context menus are available to assist. To see what is available, click beside the applicable parameter.

For more information, see Transformer Parameter Menu Options.

FME Community

The FME Community is the place for demos, how-tos, articles, FAQs, and more. Get answers to your questions, learn from other users, and suggest, vote, and comment on new features.

Search for all results about the Aggregator on the FME Community.


Keywords: AttributeAccumulator