AreaOnAreaOverlayer

From Fmepedia

AreaOnAreaOverlayer is a Workbench Transformer.

Performs an area-on-area overlay.

All input areas are intersected against each other and resultant area features are created and output. The resultant areas have all the attributes of all the original features in which they are contained.

When attributes are merged between features, existing attributes are not replaced. Therefore if the polygons being overlayed have attributes with the same name, then the values will not be transferred from one to the other. This can be worked around by renaming (AttributeRenamer), prefixing (AttributePrefixer), or removing (AttributeRemover or AttributeKeeper) attributes to avoid name collisions. The <overlap count attribute> holds the number of features that the resultant feature overlapped, which will be at least one.

If the optional list name is supplied, a list is created of all the attributes of each area that overlaid the resultant feature.