メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.41738203926 43.8029169831881, 142.416786776186 43.8034424764108, 142.416311818434 43.8032459499322, 142.415809195364 43.803041761705, 142.415318260659 43.8028367630666, 142.414830549532 43.8026340950791, 142.414322572022 43.8024296607661, 142.414987068745 43.8018382936762, 142.415260065405 43.8015924449206, 142.415419291609 43.8014766606491, 142.41562844795 43.8013093638442, 142.415783000518 43.8011902104399, 142.415994462813 43.8010144720883, 142.417065945757 43.8016703892148, 142.418102435778 43.8023244821267, 142.41738203926 43.8029169831881)) ^^http://www.opengis.net/ont/geosparql#wktLiteral