メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.274503217738 43.1061317489655, 141.273993744189 43.1056654199581, 141.273581286569 43.1052976719756, 141.274717447698 43.1046239032522, 141.274268456574 43.1042117509619, 141.275432262466 43.1036028411169, 141.276678252167 43.1028149283661, 141.277840825837 43.1038909846153, 141.274503217738 43.1061317489655)) ^^http://www.opengis.net/ont/geosparql#wktLiteral