メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.942278807995 37.7959912690031, 140.938798119712 37.7959358181218, 140.93891725626 37.7925606954835, 140.9398667492 37.7922291158607, 140.940688795757 37.7920005108409, 140.940671272516 37.7924371023301, 140.940616484873 37.7940262147444, 140.942361761233 37.7940813317334, 140.942278807995 37.7959912690031)) ^^http://www.opengis.net/ont/geosparql#wktLiteral