Re: Geographic location representations?

Greetings:

I remember reading something on the lines of 'location' & HTML in one of the
OPES drafts (www.extproxy.org).

Regards,

Bobby Sardana.
sardana@obsoft.com

Andrew Daviel wrote:

> On Tue, 26 Jun 2001, Paul Knight wrote:
>
> > Glad to see the WG chartered.
> >
> > I see the plan is that "the working group will select an already
> > standardized format to recommend for use in representing location per se."
> > I am working on an I-D which uses location information, and am very
> > interested in the candidate formats.
> >
> > Is there a list of known formats? pointers?
>
> I wrote a somewhat reductionist draft which is mentioned in the charter,
> viz.
> http://geotags.com/geo/draft-daviel-html-geo-tag-05.html
>
> This is intended for adding location data to legacy HTML documents using
> META elements familiar to most Web authors. The number of elements and
> options is deliberately small in order to minimize errors when coding by
> hand. XML is probably an appropriate encapsulation for new applications.
>
> Other formats I have come across include:
> DublinCore (coverage) http://dublincore.org/documents/1998/09/dces
> FGDC http://www.fgdc.gov/
> ISO/TC211 http://www.statkart.no/isotc211/
> NMEA 0183 http://vancouver-webpages.com/peter/nmeafaq.txt etc.
> vCard RFC2445 http://www.alternic.org/rfcs/rfc2400/rfc2426.txt
> RFC1876 http://www.alternic.org/rfcs/rfc1800/rfc1876.txt
> ISO6709 ftp://ftp.informatik.uni-erlangen.de/pub/doc/ISO/ISO-6709-summary
>
> Many of the available formats are created for specific purposes and
> may not be suitable for this WG. For instance, NMEA is designed for
> connecting marine autopilots to navigation sets such as GPS.
> FGDC and other GIS data formats I believe are created to describe
> objects such as maps or satellite images, typically rectangular
> areas aligned North-South.
>
> I suggest adopting WGS-84, because that is what the GPS system uses and
> GPS chips are becoming ubiquitious. Converting between different datums
> is a big headache in my opinion.
> There are some issues concerning altitude using WGS-4 (altitude is not
> intuitive, since the datum is not
> "ground level", or "sea level" for coastal areas, but a geometric
> construct) but it satisfies the requirement of a single universal
> measurement grid for location-based devices.
>
> --
> Andrew Daviel
> Vancouver Webpages
Received on Sat Jul 7 13:24:40 2001