<geo> (geographical coordinates) contains any expression of a set of geographic coordinates, representing a point, line, or area on the surface of the earth in some
notation.
All uses of geo within a document are required to use the same coordinate system, which is that defined by a geoDecl
element supplied in the TEI Header. If no such element is supplied, the assumption is that the content of each geo element will
be a pair of numbers separated by whitespace, to be interpreted as latitude followed by longitude according to the World Geodetic
System.