メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.3312500 24.7375000, 125.3375000 24.7375000, 125.3375000 24.7416667, 125.3312500 24.7416667, 125.3312500 24.7375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral