メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.1750000 24.8166667, 125.1812500 24.8166667, 125.1812500 24.8208334, 125.1750000 24.8208334, 125.1750000 24.8166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral