メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.601520202707 42.6342235170093, 141.600990283496 42.6347795453172, 141.600411725629 42.6353857951765, 141.599090176824 42.6349721654282, 141.59955441399 42.6342821355928, 141.59993017737 42.6336852889353, 141.600325969896 42.6330578872926, 141.600671899558 42.6325528672165, 141.601986834774 42.6333230432033, 141.602261022815 42.6334866497097, 141.601520202707 42.6342235170093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral