メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.4062500 32.1875000, 130.4125000 32.1875000, 130.4125000 32.1916667, 130.4062500 32.1916667, 130.4062500 32.1875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral