A fully qualified geotag will look like below.

{{geotag>lat:51.563999, lon=5.45454, alt=9, placename=Sint-Oedenrode, region: NL-NB, country:NL}}

This will add the following meta headers to the page:

<meta name="geo.region" content="NL-NB">
<meta name="geo.placename" content="Sint-Oedenrode">
<meta name="geo.position" content="51.563999;5.45454;9">
<meta name="geo.country" content="NL">
<meta name="icbm" content="51.563999, 5.45454">
<meta name="DC.title" content="Full geotag example">

As well as rendering the tag on the page like so: