メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.3312500 24.7958334, 125.3375000 24.7958334, 125.3375000 24.8000000, 125.3312500 24.8000000, 125.3312500 24.7958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral