メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.91907579708 34.8816904061535, 136.917728742058 34.8818403257006, 136.9170492485 34.8805989884876, 136.918237201383 34.8803254229282, 136.91907579708 34.8816904061535)) ^^http://www.opengis.net/ont/geosparql#wktLiteral