> Here is a proposed revision of Section 2.3 to address the concern. Comments
> welcome.
>
> 2.3. Latitude and Longitude Fields
[...]
> Longitude values encoded by the DHCP server MUST be normalized to the
> range from -180 to +180 degrees. Positive longitudes are east of the
> Prime Meridian (Greenwich) and negative (2s complement) longitudes
> are west of the Prime Meridian.
geoURI (rfc5870) allows for a 'crs' (coordinate reference system)
parameter so that, in future, coordinates on bodies such as The Moon
or Mars can be expressed. Some such CRSs allow a longitude value range
of 0-360, with no negative values, and of course these do not make
reference to Greenwich.
WGS84 is assumed as default, where no CRS is specified.
It would be sensible to build in such future proofing - and
consistency & compatibility - here, using the relevant sections of
GeoURI (3.4.1, 3.4.2) as a model.
See:
<http://tools.ietf.org/html/rfc5870#section-3.4.1>
<http://tools.ietf.org/html/rfc5870#section-3.4.2>
also <http://en.wikipedia.org/wiki/Geo_URI>.
--
Andy Mabbett
@pigsonthewing
http://pigsonthewing.org.uk
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