Collapse area per adm1 units for all the adm1
Collapse area per adm1 units for all the adm1 if ADM1 units where combined from SPAM2010 as they were not represneted in the GGS in the same level of detail
Collapse area per adm1 units for all the adm1 if ADM1 units where combined from SPAM2010 as they were not represneted in the GGS in the same level of detail