メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.90412057525 43.4897410700656, 141.902926886712 43.489928754573, 141.902874766204 43.4896197599562, 141.903173192969 43.4886377840904, 141.903448547435 43.48861523227, 141.903483026807 43.4886745155764, 141.903525371026 43.4887140961738, 141.903591104648 43.4887255466299, 141.903672397408 43.4887229787344, 141.903769249446 43.4887063573431, 141.903831379147 43.48867275294, 141.903913131788 43.4885856183963, 141.904127532375 43.4892726479097, 141.904266844515 43.4897183383201, 141.90412057525 43.4897410700656)) ^^http://www.opengis.net/ont/geosparql#wktLiteral