メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.272656393789 44.0207895961985, 144.271087321752 44.0206344924019, 144.271233141131 44.0200568327168, 144.27278286403 44.020210722432, 144.272656393789 44.0207895961985)) ^^http://www.opengis.net/ont/geosparql#wktLiteral