メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.799638610704 34.5600911163634, 131.800159532537 34.5601343701931, 131.79996011259 34.5611364620808, 131.799389705475 34.5610674217359, 131.799638610704 34.5600911163634)) ^^http://www.opengis.net/ont/geosparql#wktLiteral