メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.247789256052 43.0541545050067, 141.247709877872 43.0545176183661, 141.247577766863 43.0554033731516, 141.247514470484 43.055803409119, 141.247010797689 43.0557960449256, 141.245991755073 43.0557752313731, 141.246028964078 43.0553641379403, 141.246143749886 43.0540780672836, 141.246166112663 43.0538302164125, 141.247826335399 43.0539095241678, 141.247789256052 43.0541545050067)) ^^http://www.opengis.net/ont/geosparql#wktLiteral