@kieranmg​ 

If you want ot process data in overlapping area's you can spatial relate the area's first.

Then clone the area's which overlap 1 or more times.

Then you can do your processing grouped by area_ID and _copynum (attribute from cloner)

Thanks gio, i've attempted this but i'm not sure it will work. The overlapping data will have a _copynum value of 1,2.. etc but each internal non-overlapping part will always be 0, so the group by won't work. hope that makes sense

@kieranmg​ 

I wrote :

Group By on area_ID and _copynum.

Either concatenate them or use both attributes in the group by.

Latter is not always available on all transformers.

If you don't have an unique area id make one using a counter.

So group by is possible, in fact i do it all the time.

Also this question has been posted in various forms.

I would advice to use t he search function in this forum. Often this question is in relation to clippers, overlayers.

It always helps to post a sample data set, you get sample solutions pretty quick on this forum.

Greets,

Gio

Thanks Gio, sorry i meant to include that this was using both area_id & copy_num.. The bit i was overlooking was the 'Generating List' parameter in the SpatialRelator so i could use ListExploder to get the other areas rather than clone. Thanks for sending me on the right path