メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.399696676672 43.0661536312606, 141.400968036904 43.0666396930146, 141.401515576743 43.0669171951655, 141.402142087108 43.0672419084363, 141.401751295167 43.0676176692425, 141.401330984403 43.0680538343748, 141.400431605043 43.0676358742165, 141.400241544877 43.0675480278096, 141.399106308261 43.0671228202567, 141.398163182829 43.0667696428037, 141.398559094079 43.0662538352954, 141.398896557302 43.0657952627368, 141.399696676672 43.0661536312606)) ^^http://www.opengis.net/ont/geosparql#wktLiteral