メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.901895123152 43.479337213433, 141.902054963274 43.4799243812975, 141.902271171445 43.4806136207612, 141.901521654097 43.4807308337079, 141.901371801584 43.480237366729, 141.900695314418 43.4802975510526, 141.900552885624 43.4798406050302, 141.90038605347 43.4795703312937, 141.900209752459 43.4790060711124, 141.900253417607 43.4789994176834, 141.901721331708 43.4787752136995, 141.901895123152 43.479337213433)) ^^http://www.opengis.net/ont/geosparql#wktLiteral