メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.7312500 26.2125000, 127.7375000 26.2125000, 127.7375000 26.2166667, 127.7312500 26.2166667, 127.7312500 26.2125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral