メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.605274193929 34.5296827730985, 136.603986035522 34.5303447236087, 136.603274837655 34.5294971600186, 136.604148087763 34.528189171717, 136.605274193929 34.5296827730985)) ^^http://www.opengis.net/ont/geosparql#wktLiteral