メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.418104125164 43.7409103415259, 142.41814850713 43.7413989529012, 142.416721797867 43.741479001867, 142.416047821734 43.7414955636647, 142.416050173531 43.7415220008944, 142.414134568864 43.7416208773947, 142.414113551615 43.7411309647799, 142.414059765788 43.7406458618781, 142.41593423039 43.7405421589762, 142.418052534931 43.7404061111068, 142.418104125164 43.7409103415259)) ^^http://www.opengis.net/ont/geosparql#wktLiteral