メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.362830583836 43.7721643079832, 142.362997017425 43.7724882377025, 142.363132932525 43.7727293412251, 142.36311500342 43.7727345091841, 142.362781577865 43.7728307350386, 142.361609620007 43.7731891546719, 142.361299344745 43.7726222979526, 142.360978964199 43.7720514072457, 142.362521741491 43.771608248465, 142.362830583836 43.7721643079832)) ^^http://www.opengis.net/ont/geosparql#wktLiteral