メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.6125000 33.8541667, 134.6187500 33.8541667, 134.6187500 33.8583333, 134.6125000 33.8583333, 134.6125000 33.8541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral