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<entry-title>h-geo</entry-title>
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<span class="h-card vcard"><span class="p-name fn">[[User:Tantek|Tantek Çelik]]</span> (<span class="p-role role">Editor</span>)</span>
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----
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<dfn style="font-style:normal;font-weight:bold">h-geo</dfn> is a simple, open format for publishing [http://en.wikipedia.org/wiki/WGS84 WGS84] geographic coordinates. h-geo is one of several open [[microformats|microformat]] draft standards suitable for embedding data in HTML/HTML5.
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h-geo is the [[microformats2]] update to [[geo]]. It is most commonly used as part of an [[h-card]] or [[h-event]].
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{{cc0-owfa-license}}
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== Example ==
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Here is a simple h-geo example:
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<source lang=html4strict>
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<p class="h-geo">
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  <span class="p-latitude">-27.116667</span>,
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  <span class="p-longitude">-109.366667</span>
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</p>
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</source>
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=== Get started ===
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The class '''<code>h-geo</code>''' is a ''root class name'' that indicates the presence of an h-geo.
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'''p-latitude''', '''p-longitude''' and '''p-altitude''' classnames define an element as a ''property'' of the h-geo.
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See [[microformats2-parsing]] to learn more about property classnames.
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== Properties ==
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h-geo properties, inside an element with class '''h-geo''':
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* '''<code>p-latitude</code>''' - decimal latitude
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* '''<code>p-longitude</code>''' - decimal longitude
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* '''<code>p-altitude</code>''' - decimal altitude
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All properties are optional.
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== Status ==
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'''h-geo''' is a microformats.org draft specification. Public discussion on h-geo takes place on [[h-geo-feedback]], the #microformats [[irc]] channel on irc.freenode.net, and [http://microformats.org/discuss/mail/microformats-new/ microformats-new mailing list].
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h-geo is ready to use and implemented in the wild, but for backwards compatibility you should also mark h-geos up with classic [[geo]] classnames.
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== Property Details ==
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'''p-altitude''' refers to the distance in metres from the nominal sea level along the tangent of the earth’s curve. For more information refer to the [http://en.wikipedia.org/wiki/WGS84 WGS84] specification.
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== FAQ ==
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'''How should I mark up lat/long coordinates without them looking messy and confusing?'''
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Unless your content is targeted at an audience with a high leg authoring '''p-latitude''' and '''p-longitude''' as plain numbers on a webpage may not be the best approach. In addition to this there may be accessibility issues due to the potentially long strings of numbers being read out.
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You could present the coordinates in a more human-readable form, retaining the decimal coordinates inside data value attributes:
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<source lang=html4strict>
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<p class="h-geo">
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  <data class="p-longitude" value="-27.116667">27° 7′ 0″ S</data>,
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  <data class="p-latitude" value="-109.366667">109° 22′ 0″ W</data>
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</p>
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</source>
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Alternatively you could not show coordinates at all and simply show a human-readable representation of the location, with the lat/long in value attributes of empty data elements.
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== Examples in the Wild ==
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* … add any h-geo examples you find in the wild
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{{h-spec-section-validating}}
 
 
== Backward Compatibility ==
=== Publisher Compatibility ===
For backward compatibility, you may wish to use classic [[geo]] classnames in addition to the more future-proof h-geo properties, for example:
 
<source lang=html4strict>
<p class="h-geo geo">
  <span class="p-latitude latitude">-27.116667</span>,
  <span class="p-longitude longitude">-109.366667</span>
</p>
</source>
 
=== Parser Compatibility ===
Microformats parsers should detect classic properties and parse them as microformats2 properties. If an "h-geo" is found, don't look for an "geo" on the same element.
 
Compatibility root class name: geo
 
Properties: (parsed as p- plain text unless otherwise specified)
 
* latitude
* longitude
 
== Background ==
 
h-geo is based on the [http://en.wikipedia.org/wiki/WGS84 WGS84] standard, as well as existing [[geo]] specification, which was extracted from [[hCard]] in order to allow it to be used for applications other than contact information.
 
== See Also ==
* [[microformats2]]
* [[h-card]] and [[h-event]] often contain h-geo
* [[h-adr]] is used to mark up human-readable structured addresses
 
[[Category:Draft Specifications]]

Revision as of 19:44, 25 August 2013

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