メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.6937500 26.1166667, 127.7000000 26.1166667, 127.7000000 26.1208334, 127.6937500 26.1208334, 127.6937500 26.1166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral