This ticket follows this discussion on TEI-L:
The basic request was to be able to have multiple <geo> tags in a <location> element, but with each associated with a different coordinate system. However, the Guidelines say:
"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."
No-one seems to know why this restriction exists. Syd B suggests that <geo> should be made a member of att.declaring, so that individual <geo> elements can be associated with distinct <geoDecl> elements in the header.