メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7312500 35.2291667, 132.7375000 35.2291667, 132.7375000 35.2333333, 132.7312500 35.2333333, 132.7312500 35.2291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral