Hi,
Do you want to ZERO out the key figures immediately when you load the data from PlanArea to Cube?
If you want to ZERO out you could define an attribute called REGION on the Location infoobject.
You have to fill this ONE time as master data.
So:
Location 1 = REGION A
Location 2 = REGION A
Location 3 = REGION B
If Load this REGION also in your infocube.
With a new load from this cube to itself you can zero out the key figures.
Within the DTP you can select the REGION.
In this way you can decide yourself which REGION to clean.