メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.860543427302 43.3382835264715, 141.860614800984 43.3385343424975, 141.860665182321 43.3387113842253, 141.860752532815 43.3390183743006, 141.858517081285 43.3393729431527, 141.858513004264 43.3393626617973, 141.85843117708 43.3390793889464, 141.858356185757 43.3388803896188, 141.858303489911 43.3386524934412, 141.858135074113 43.3380894469889, 141.860398344806 43.3377204222734, 141.860543427302 43.3382835264715)) ^^http://www.opengis.net/ont/geosparql#wktLiteral