メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.884907911779 43.0176822418361, 142.884647775041 43.0175183367967, 142.883783108443 43.0169737037292, 142.883820109394 43.0169415695791, 142.883887127811 43.0168834594902, 142.884777133338 43.0161113854534, 142.884839102823 43.0161491612612, 142.885605495167 43.0166072629357, 142.885722572195 43.0166772244366, 142.885917502771 43.0168009085777, 142.885413768039 43.0172348886909, 142.884907911779 43.0176822418361)) ^^http://www.opengis.net/ont/geosparql#wktLiteral