Homogenous Aggregate
From Fmepedia
An Aggregate is a group of features - a set of individual graphic elements that the user has chosen to bring together (but not merge) as a single entity.
A Homogeneous Aggregate is where each of the features in the aggregate is of the same geometry type - for example they are all lines. This is important because some formats only support the homogeneous type of aggregate.
Some of the new geometry types in FME's updated Geometry Model are:
- IFMEMultiText
- IFMEMultiPoint
- IFMEMultiArea
- IFMEMultiCurve
These are any geometry that is made up of multiple features of the same type; i.e. a homogeneous aggregate.
For example IFMEMultiPoint is a single feature made up of multiple point features.
Again, this is important because it allows FME to distinguish between homogeneous aggregates and heterogeneous aggregates (aggregate features made up of different geometries) and therefore improves handling when the writer supports one but not the other.
