メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.2312500 26.5791667, 127.2375000 26.5791667, 127.2375000 26.5833333, 127.2312500 26.5833333, 127.2312500 26.5791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral