メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.574960668661 43.3271014105072, 145.575506742763 43.3274982274023, 145.575011957507 43.3278849624284, 145.574445502776 43.3282929066026, 145.573899662881 43.3279002991736, 145.573357272035 43.3275072365962, 145.573893841646 43.3270953839977, 145.574423233333 43.326707364015, 145.574960668661 43.3271014105072)) ^^http://www.opengis.net/ont/geosparql#wktLiteral