メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.381996459289 40.5587477044538, 141.381682651321 40.5588755958697, 141.381087928494 40.5587939200953, 141.380695980965 40.5588879501212, 141.380343547223 40.5588896214745, 141.380101775713 40.5588753943313, 141.379526898134 40.5587552711247, 141.378978396788 40.5584409700602, 141.379324247241 40.5583222572596, 141.379735496145 40.5581970773163, 141.380030329256 40.5581404493467, 141.380308802163 40.5581306172182, 141.380643451787 40.5581715256143, 141.380894343591 40.5581958418029, 141.381659787395 40.5583753851418, 141.381864296251 40.5586558115759, 141.381996459289 40.5587477044538)) ^^http://www.opengis.net/ont/geosparql#wktLiteral