メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.870787589895 34.5134397877468, 135.869977568555 34.5129044946081, 135.870242085951 34.5126245811735, 135.869883477763 34.5123750137853, 135.870214064363 34.5120610779716, 135.871372417641 34.5128239472452, 135.870787589895 34.5134397877468)) ^^http://www.opengis.net/ont/geosparql#wktLiteral