メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.302520603702 36.2264024079716, 136.290884088085 36.2196601488644, 136.302184813203 36.2195343951324, 136.302520603702 36.2264024079716)) ^^http://www.opengis.net/ont/geosparql#wktLiteral