>> Hectare certainly shows up in surveying. 1 acre is ~0.45 hectares.
>
>I get 4046.85 m^2, or ~0.405 hectare.

Well, I did indicate approximate, I just didn't say how approximate ;))) I 
can see my memory is failing worse than I thought.

>Therefore, my ~52000 ft^2 lot is about 0.483 hectare.

I used to describe the property I had in NZ as an acre plus 10 sq metres ... 
IIRC it was 0.4056 Hectare. Most people didn't pick up on the mixed imperial 
and metric units. 

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