Sorry don't understand the question.
Could you please attach sample data and explain what you expect more in detail?
Good morning Marc
in your example above the "sq mtrs" are like any other measure which can be applied to a viz - but you would need to map either a shape file (spatial file) or using the inherent Tableau capability to map geo files - once the map is defined adding the area in square meters is just like adding total sales to the map
don't know that answers your question
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