メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.269526732119 44.0204647411376, 144.267992364076 44.0203265721032, 144.268072720539 44.0197371431813, 144.269680921571 44.0198921187169, 144.269526732119 44.0204647411376)) ^^http://www.opengis.net/ont/geosparql#wktLiteral