RE: altitude measurement

Hi 

 

I have read your discussion on "altitude measurement" with interest. 

 

Is it possible to explain when and why are altitude expressed in feet and
when and why are meters utilised.

 

I know that in aviation and in mapping  feet are still used and in
construction meters, why the difference?

 

What is the correct or rather preferred unit to be utilised. 

 

Thanks 

 

Johann Hechter

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