[CF-metadata] Stereographic projection

[John Caron]

Jonathan Gregory wrote:

>Dear John
>
>Thanks for your comments on polar stereographic. I agree that the projection
>should be renamed "stereographic". As the proj notes suggest, the names of
>the parameters seem rather variable. I'd prefer their polar stereographic set:
>
>latitude_of_natural_origin
>longitude_of_natural_origin
>scale_factor_at_natural_origin
>false_easting
>false_northing
>
>because it's complete set, including the scale factor, and because it avoids
>using the word "center", which is liable to cause spelling mistakes by non-US
>users.
>
>I think we should note that the longitude_of_natural_origin is the straight
>vertical longitude from the pole of the FGDC terminology, and that polar
>stereographic is a special case with latitude_of_natural_origin being 90N
>or 90S.
>
>Cheers
>
>Jonathan
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>  
>
sounds good to me