The current revision of the vCard specification (currently worked on in the IETF’s VCARDDAV working group) has changed the format of the “GEO” property. The new definition requires a URI rather than the lat/lon tupel as value, and notes in an example that the “geo:” URI scheme is “particularly well-suited”, although other URI schemes are allowed too. A example vCard using the “geo:” URI looks like this (edited for brevity):

    BEGIN:VCARD
    VERSION:4.0
    FN:Simon Perreault
    ...
    GEO;TYPE=work:geo:46.772673,-71.282945
    ...
    CLASS:PUBLIC
    END:VCARD

As outlined above, the structure of vCards allows to supply parameters for properties – in the example above, the GEO property is specified for the “work” location of the contact.