メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.7687500 26.3166667, 127.7750000 26.3166667, 127.7750000 26.3208334, 127.7687500 26.3208334, 127.7687500 26.3166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral