メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.588321425048 33.2448132304767, 131.587405417611 33.2449721517102, 131.585851776013 33.2452664966623, 131.584832340442 33.2454559629108, 131.58574764778 33.2449584433068, 131.586942552736 33.2443447344892, 131.587949125668 33.2438215111034, 131.588016092881 33.244037558835, 131.588115425998 33.2443110621107, 131.588321425048 33.2448132304767)) ^^http://www.opengis.net/ont/geosparql#wktLiteral