メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.9562500 26.4875000, 127.9625000 26.4875000, 127.9625000 26.4916667, 127.9562500 26.4916667, 127.9562500 26.4875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral