メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.885316133681 37.5834408931194, 139.885319788235 37.5835546528299, 139.885309108815 37.583619985802, 139.885152092012 37.5839016420796, 139.884447882754 37.5833872066639, 139.885316133681 37.5834408931194)) ^^http://www.opengis.net/ont/geosparql#wktLiteral