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The geo URI scheme is a Uniform Resource Identifier (URI) scheme defined by the Internet Engineering Task Force's RFC 5870 (published 8 June 2010) as: a Uniform Resource Identifier (URI) for geographic locations using the 'geo' scheme name. A 'geo' URI identifies a physical location in a two- or three-dimensional coordinate reference system in a compact, simple, human-readable, and protocol-independent way.〔 The current revision of the vCard specification supports geo URIs in a vCard's "GEO" property, and the GeoSMS standard uses geo URIs for geotagging SMS messages. Android based devices support geo URIs, although that implementation is based on a draft revision of the specification, and supports a different set of URI parameters and query strings. A geo URI is not to be confused with the site GeoUrl (which implements ICBM address). ==Example == A simple geo URI might look like: : geo:37.786971,-122.399677where the two numerical values represent latitude and longitude respectively,〔 and are separated by a comma.〔 If a third comma-separated value is present, it represents altitude.〔 Coordinates in the Southern and Western hemispheres as well as altitudes below the coordinate reference system (depths) are signed negative with a leading dash.〔 The geo URI also allows for an optional "uncertainty" value, separated by a semicolon, representing the uncertainty of the location in meters, and is described using the "u" URI parameter.〔 A geo URI with an uncertainty parameter looks as follows: : geo:37.786971,-122.399677;u=35A geo URI may, for example, be included on a web page, as HTML: : Wikimedia Headquartersso that a geo URI-aware user agent such as a web browser could launch the user's chosen mapping service; or it could be used in an Atom feed or other XML file. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Geo URI scheme」の詳細全文を読む スポンサード リンク
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