メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.3312500 35.8291667, 140.3375000 35.8291667, 140.3375000 35.8333333, 140.3312500 35.8333333, 140.3312500 35.8291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral