Geo is a
microformat used for marking up
WGS84
The World Geodetic System (WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS. The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also desc ...
geographical coordinates (
latitude
In geography, latitude is a coordinate that specifies the north–south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from –90° at the south pole to 90° at the north pole ...
;
longitude) in
(X)HTML.
Although termed a "draft" specification, this is a formality, and the format is stable and in widespread use;
not least as a sub-set of the published
hCalendar and
hCard microformat specifications, neither of which is still a draft.
Use of Geo allows parsing tools (for example other websites, or
Firefox's
Operator extension) to extract the locations, and display them using some other website or
mapping tool, or to load them into a
GPS
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite sy ...
device, index or aggregate them, or convert them into an alternative format.
Usage
*If latitude is present, so must be longitude, and vice versa.
*The same number of decimal places should be used in each value, including trailing zeroes.
[''Must'' and ''should'' are used per the IETF document ]
The Geo microformat is applied using three
HTML classes
HTML attributes are special words used inside the opening tag to control the element's behaviour. HTML attributes are a modifier of an ''HTML element type''. An attribute either modifies the default functionality of an element type or provides fu ...
. For example, the marked-up text:
Belvide: 52.686; -2.193
becomes:
Belvide: 52.686; -2.193
by adding the class-attribute values "geo", "latitude" and "longitude".
This will display
Belvide: 52.686; -2.193
and a geo microformat for that location,
Belvide Reservoir
Belvide Reservoir is a reservoir in South Staffordshire, England. It was built in 1833 to supply the Birmingham and Liverpool Junction Canal, and has been managed as a nature reserve since 1977. It has been used to study the effect of water leve ...
, which will be detected, on this page, by microformat parsing tools.
hCard
Each Geo microformat may be wrapped in an
hCard microformat, allowing for the inclusion of personal, organisational or venue names, postal addresses, telephone contacts,
URLs, pictures, etc.
Extensions
There are three proposals, none mutually-exclusive, to extend the geo microformat:
geo-extension- for representing coordinates on other planets, moons etc., and with non-WGS84 schema
geo-elevation- for representing altitude
geo-waypoint- for representing routes and boundaries, using waypoints
Users
Organisations and websites using Geo include:
*
Flickr - on over three million photo pages
*
Geograph - on over one million photo pages
*
Google
*
Multimap - all map pages
*
OpenStreetMap
OpenStreetMap (OSM) is a free, open geographic database updated and maintained by a community of volunteers via open collaboration. Contributors collect data from surveys, trace from aerial imagery and also import from other freely licensed ge ...
- wiki pages about places, GPS traces and diary entries
*Wikipedia - embedded in geo templates of map-link pages
**
German Wikipedia - ditto
**
Dutch Wikipedia
The Dutch Wikipedia ( nl, Nederlandstalige Wikipedia) is the Dutch-language edition of the free online encyclopedia, Wikipedia. It was founded on 19 June 2001.
As of , the Dutch Wikipedia is the -largest Wikipedia edition, with articles. It w ...
- ditto
**
Swedish Wikipedia - ditto
**
Italian Wikipedia
The Italian Wikipedia ( it, Wikipedia in italiano) is the Italian-language edition of Wikipedia. This edition was created on May 11, 2001 and first edited on June 11, 2001. As of , , it has articles and more than registered accounts. It is th ...
*
Wikivoyage
Many of the organisations publishing hCard include a geo as part of that.
h-geo
An alternative to Geo, h-geo, has been proposed. This is applied using three
HTML classes
HTML attributes are special words used inside the opening tag to control the element's behaviour. HTML attributes are a modifier of an ''HTML element type''. An attribute either modifies the default functionality of an element type or provides fu ...
. For example:
Belvide: 52.686; -2.193; 120
by adding the class-attribute values "h-geo", "p-latitude", "p-longitude", and "p-altitude".
See also
*
GeoSPARQL,
Geographic Information System
A geographic information system (GIS) is a type of database containing geographic data (that is, descriptions of phenomena for which location is relevant), combined with software tools for managing, analyzing, and visualizing those data. In a ...
(GIS) data for the W3C
Semantic Web using the
Resource Description Framework (RDF) and
SPARQL
*
Geo URI
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 ' ...
specified in
*
ISO 6709
*
ICBM address
ICBM (intercontinental ballistic missile) address or missile address is hacker slang for one's longitude and latitude (preferably to seconds-of-arc accuracy) when placed in a signature or another publicly available file.
Origin
The form that u ...
, an older
geotagging format
*
Schema.org
Schema.org is a reference website that publishes documentation and guidelines for using structured data mark-up on web-pages (called microdata). Its main objective is to standardize HTML tags to be used by webmasters for creating rich results (di ...
, web standar
schema.org/geo
Notes
References
External links
Geo specwith notes and examples
Geo cheat-sheeta quick reference
{{DEFAULTSORT:Geo (Microformat)
Microformats
Geocodes