メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.705355727821 44.3706383227615, 141.705291577421 44.3706797842068, 141.704780681656 44.3710155859768, 141.703873526939 44.3703101311757, 141.703594642079 44.3700730975894, 141.703832638006 44.3698001890446, 141.703949834638 44.3696727081867, 141.704022271586 44.3695991904981, 141.704638070558 44.370073741796, 141.705275737252 44.370574938137, 141.705355727821 44.3706383227615)) ^^http://www.opengis.net/ont/geosparql#wktLiteral