メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351133804612 43.0513117487675, 141.35113589173 43.0513024766754, 141.351176402544 43.0511157882406, 141.352797978003 43.0513245963792, 141.352663115602 43.0519187402755, 141.352541638675 43.0524890763461, 141.350921097088 43.0522730284948, 141.351047488782 43.0516954887338, 141.351096719 43.0514764464634, 141.351133804612 43.0513117487675)) ^^http://www.opengis.net/ont/geosparql#wktLiteral