メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.2437500 24.4416667, 124.2500000 24.4416667, 124.2500000 24.4458334, 124.2437500 24.4458334, 124.2437500 24.4416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral