メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2312500 24.9291667, 125.2375000 24.9291667, 125.2375000 24.9333333, 125.2312500 24.9333333, 125.2312500 24.9291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral