メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.877902458395 43.0146559941046, 142.877712980927 43.0145432387771, 142.876814110388 43.0140084484755, 142.876548581402 43.0138480012456, 142.876660301549 43.0137511102816, 142.87730833579 43.0131975223413, 142.878036270992 43.0136336595617, 142.878151454592 43.0137026540455, 142.878032841957 43.0142370325951, 142.877902458395 43.0146559941046)) ^^http://www.opengis.net/ont/geosparql#wktLiteral