メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.887689930084 37.0550361547309, 140.885939534216 37.0549510442361, 140.885973944334 37.0542063485313, 140.886921985258 37.0542295344441, 140.8869305091 37.0538490270854, 140.88799360846 37.0538723084614, 140.887827296558 37.0545220839156, 140.887764322598 37.0546935709107, 140.887689930084 37.0550361547309)) ^^http://www.opengis.net/ont/geosparql#wktLiteral