メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.321350821668 43.7707439071688, 142.321793033534 43.7711774608472, 142.32222329605 43.77161814032, 142.320632679644 43.7724756346009, 142.319960601483 43.7728121648599, 142.318877336723 43.7733760931813, 142.318446868075 43.7729571634799, 142.318007724669 43.7725267922592, 142.317527340022 43.772053652891, 142.318387921492 43.7716149707081, 142.319258452307 43.7711263484216, 142.320043625625 43.7707189746, 142.320265554092 43.7706006638984, 142.320742475157 43.770346387598, 142.320878659569 43.7702737841018, 142.321350821668 43.7707439071688)) ^^http://www.opengis.net/ont/geosparql#wktLiteral