メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.2437500 36.0000000, 136.2500000 36.0000000, 136.2500000 36.0041667, 136.2437500 36.0041667, 136.2437500 36.0000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral