メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.527975867486 36.4098871416331, 140.527210544468 36.4103638325404, 140.52641064947 36.4095456339794, 140.52674951271 36.4093135627018, 140.527468490307 36.4089009722134, 140.527489890387 36.4088882438132, 140.527975867486 36.4098871416331)) ^^http://www.opengis.net/ont/geosparql#wktLiteral