メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.7500000 26.2916667, 127.7562500 26.2916667, 127.7562500 26.2958334, 127.7500000 26.2958334, 127.7500000 26.2916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral