メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.062895725686 35.4246625449351, 137.060161487582 35.4246381768502, 137.060167980095 35.423461635422, 137.062896192636 35.4234671962433, 137.062903269729 35.4241887145422, 137.062895725686 35.4246625449351)) ^^http://www.opengis.net/ont/geosparql#wktLiteral