Calculate area on dat in a GCS

Discussion created by hideko.feitoza on Oct 17, 2013
Latest reply on Oct 18, 2013 by GSCUser85

It looks so basic matters but I wonder how to calculate area over a data defined in GCS, like a shapefile on attachment. Obviously inthis shapefile I cannot calculate area or perimeter. I only could manage to do this by setting the dataframe as WGS84 UTM 24 south randomly but I koow this is not correct as the shapefile is for entire country. A friend told me that ArcGIS would not calculate area over a data defined in GCS, other said that it is possible on postGIS but I think the powerfull ArcGIS would have some way...I would like some help on this, please....