geo cheatsheet

geo properties and how to use them.

Properties (Class Names)

bold {1}	MUST be present exactly once
italic*	OPTIONAL, and MAY occur more than once
+	MUST be present, and MAY occur more than once
?	OPTIONAL, but MUST NOT occur more than once
[square brackets]	list of common values
(parentheses)	data format
#	comment
!	awaiting documentation

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.
Coordinates MUST use the datum of WGS84.
If latitude is present, so MUST be longitude, and vice versa.
Coordinates MAY be combined a single <abbr> element; then the latitude and longitude MUST be separated by a semicolon in the title attribute and latitude MUST be first:

<abbr class="geo" title="37.386013;-122.082932">home</abbr>

Best practice is that the same number of decimal places SHOULD be used in each value, with trailing zeroes if applicable.
Some sources for latitude/ longitude coordinates

Geo
Geo cheatsheet
Geo examples
geo formats - previous/other attempts at geo related formats
Geo brainstorming - brainstorms and other explorations relating to Geo (and Geo in hCard).
- see also hCard brainstorming
Geo advocacy - encourage others to use Geo.
Geo examples in the wild
Geo forms part of hcard, so please use:
- hCard FAQ. If you have any questions about Geo, check the hCard FAQ.
- hCard feedback
- hCard issues
location-formats - research which led to the development of Geo.
proposed extensions
- geo-extension-nonWGS84 - extend Geo for representing coordinates on other planets, moons etc.; and for other terrestrial schema
- geo-extension-waypoints - extend Geo for representing: sets of waypoints; tracks; routes; and boundaries
Geo profile - draft
Other cheatsheets: hAtom cheatsheet, hCard cheatsheet (also adr cheatsheet + geo cheatsheet), hCalendar cheatsheet, hResume cheatsheet, hReview cheatsheet, PDF cheatsheet