メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.3875000 34.2458334, 134.3937500 34.2458334, 134.3937500 34.2500000, 134.3875000 34.2500000, 134.3875000 34.2458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral