メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0937500 34.2666667, 134.1000000 34.2666667, 134.1000000 34.2708334, 134.0937500 34.2708334, 134.0937500 34.2666667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral