メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.3187500 24.8250000, 125.3250000 24.8250000, 125.3250000 24.8291667, 125.3187500 24.8291667, 125.3187500 24.8250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral