メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2937500 24.7208334, 125.3000000 24.7208334, 125.3000000 24.7250000, 125.2937500 24.7250000, 125.2937500 24.7208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral