メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.272555405135 44.0213556044701, 144.270986002711 44.0211912096385, 144.271087321752 44.0206344924019, 144.272656393789 44.0207895961985, 144.272686897407 44.0207925206434, 144.272555405135 44.0213556044701)) ^^http://www.opengis.net/ont/geosparql#wktLiteral