メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.363364250071 43.0887787116245, 141.363112258309 43.0897354019065, 141.362578463305 43.0896608654409, 141.361535830848 43.0895179562074, 141.361655223556 43.089065688384, 141.361727364406 43.0888150368301, 141.361903195769 43.0881028526771, 141.362511928884 43.0881833878559, 141.363485717384 43.0883279348176, 141.363364250071 43.0887787116245)) ^^http://www.opengis.net/ont/geosparql#wktLiteral