Aggregate Geometries

A feature with aggregate geometry has an fme_geometry value equal to fme_aggregate and an fme_type value equal to either fme_point, fme_line, or fme_area. FME uses aggregates to represent features with multi-part geometries: geometries that are composed of several disjoint pieces.

In most situations, the components of an aggregate are homogeneous. That is, if fme_type is fme_point, then the aggregate contains point geometries; if fme_type is fme_line then the aggregate contains line geometries; and so on.

However, your application should be designed to handle non-homogeneous aggregates gracefully since it is possible that some data sources may contain such features. Non-homogeneous aggregates have no value for fme_type.