メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.679419366541 34.8326939865894, 134.67921176798 34.8327601483866, 134.678793147761 34.8318616208708, 134.679451742106 34.8316467668436, 134.679897408806 34.8325416225907, 134.679657523196 34.8326180894661, 134.679419366541 34.8326939865894)) ^^http://www.opengis.net/ont/geosparql#wktLiteral