メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.2750000 24.4833333, 124.2812500 24.4833333, 124.2812500 24.4875000, 124.2750000 24.4875000, 124.2750000 24.4833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral