メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.5937500 34.2416667, 132.6000000 34.2416667, 132.6000000 34.2458334, 132.5937500 34.2458334, 132.5937500 34.2416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral