Ns102:Coordinates

Property:Coordinates describes the geographic coordinate of some place. If a page contains a value for this property, then coordinates in the list on this page and in the page's factbox will also provide "service links" to provides service::online maps in a pop-up (click the (?) icon.

You can enter coordinates in several formats, for example [[Coordinates:: 32°42′54″ N, 117°9′45″ W]], or 32.715° N, 117.163° W or 32.715° -117.163°

See the help for Geographic coordinate for all the ways you can enter geographical coordinates.