メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.873946004135 35.2745862483165, 136.873904846547 35.2750074909991, 136.871821124736 35.2746513718311, 136.871794257215 35.2742130649278, 136.871791948798 35.274175171057, 136.871743951651 35.2737323762209, 136.872809438401 35.2739270498472, 136.873990884964 35.274126844995, 136.873946004135 35.2745862483165)) ^^http://www.opengis.net/ont/geosparql#wktLiteral