メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.8937500 26.6708334, 127.9000000 26.6708334, 127.9000000 26.6750000, 127.8937500 26.6750000, 127.8937500 26.6708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral