メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.713152935503 35.3629363417891, 136.709806984496 35.3633566900889, 136.709659811773 35.3614615913633, 136.711364214662 35.3613889793326, 136.713043283298 35.3613037123898, 136.713152935503 35.3629363417891)) ^^http://www.opengis.net/ont/geosparql#wktLiteral