メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.576008719509 43.3262915670049, 145.576664198297 43.3265682533601, 145.576032402808 43.3270914633887, 145.575506742763 43.3274982274023, 145.574960668661 43.3271014105072, 145.574423233333 43.326707364015, 145.575287718338 43.325993155967, 145.576008719509 43.3262915670049)) ^^http://www.opengis.net/ont/geosparql#wktLiteral