メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.4312500 24.7375000, 125.4375000 24.7375000, 125.4375000 24.7416667, 125.4312500 24.7416667, 125.4312500 24.7375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral