Como remover a informação Z e M de polígonos?
How To: Remove Z- and/or M-values from a feature class
Another way. Just FYI.
You could create a new polygon Feature Class in ArcCatalog (without enabling Z and M Values, i.e. Keep the boxes unchecked for "Coordinates include M values" and "Coordinates include Z values"). Also Import the Fields from old Feature Class to New Feature Class.
Once the FC is created, use Append to add the records from the old FC to new FC.
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