メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.361727364406 43.0888150368301, 141.361655223556 43.089065688384, 141.361535830848 43.0895179562074, 141.359886367712 43.089295349756, 141.360069938714 43.0886001078951, 141.360234938355 43.0878816535784, 141.361903195769 43.0881028526771, 141.361727364406 43.0888150368301)) ^^http://www.opengis.net/ont/geosparql#wktLiteral