メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2812500 24.8208334, 125.2875000 24.8208334, 125.2875000 24.8250000, 125.2812500 24.8250000, 125.2812500 24.8208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral