メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.473421168464 43.0345163460435, 144.472659255444 43.0342945084157, 144.472672909331 43.0340939519481, 144.4726757998 43.0340572555509, 144.472720952236 43.0335132424923, 144.47274459723 43.0332708582513, 144.472698407325 43.0330378493592, 144.472650643546 43.032761196762, 144.472616769201 43.0324233010492, 144.472770959087 43.0323872510656, 144.472911897869 43.0329768042285, 144.474161796588 43.0329136801002, 144.474416970368 43.0348062775231, 144.47372849366 43.0346058742456, 144.473421168464 43.0345163460435)) ^^http://www.opengis.net/ont/geosparql#wktLiteral