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Re: Geodesic coordinates



Do we need standard uncertainties for these coordinates so we know just 
how large an area we have to search in order to find the author and 
technical editor? 

David

Howard Flack wrote:

> For the ever increasing number of users of GPS systems, I suggest that 
> something like the following should be considered for inclusion in the 
> CIF core dictionary.
>
> _audit_author_geodesic_longitude
> _audit_author_geodesic_latitude
> _audit_contact_author_geodesic_longitude
> _audit_contact_author_geodesic_latitude
> _journal_coeditor_geodesic_longitude
> _journal_coeditor_geodesic_latitude
> _journal_techeditor_geodesic_longitude
> _journal_techeditor_geodesic_latitude
> _publ_contact_author_geodesic_longitude
> _publ_contact_author_geodesic_latitude
> _publ_contact_geodesic_longitude
> _publ_contact_geodesic_latitude
>
> Until the era of GPS there were very many locally based coordinate 
> systems. Nowadays for terrestial, marine and aircraft navigation it is 
> almost always coordinates based on the WGS84 geodesic datum with the 
> mean position of the cross wires of the Airy telescope at Greenwich, 
> England being taking as the prime meridean.
>
> One finds the numeric values of the above coordinates given in a 
> variety of formats:
>   Whole degrees with decimal fractions of a degree following
>     the decimal point or comma
>   Whole degrees and whole minutes with decimal fractions of a minute
>   Whole degrees, whole minutes and whole seconds with decimal
>     fractions of a second.
>
> The longitude is given:
>   either as a positive number followed by N (Northern hemisphere) or S 
> (Southern hemisphere)
>   or a positive number (northern hemisphere) or negative number 
> (southern hemisphere)
>
> The latitude is done likewise with E/W or positive and negative numbers.
>
> H.
>
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-- 
Dr. I.D.Brown, Professor Emeritus,
Department of Physics and Astronomy
McMaster University, Hamilton
Ontario, Canada


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