メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.755923795132 42.903059402514, 140.757285588462 42.9029871571312, 140.757333770735 42.9029846206243, 140.757404842711 42.9037230414283, 140.755994830178 42.9038025355597, 140.755224015438 42.9038337497456, 140.755170998399 42.9029430854371, 140.755919573613 42.902909260314, 140.755923795132 42.903059402514)) ^^http://www.opengis.net/ont/geosparql#wktLiteral