メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.9812500 26.6250000, 127.9875000 26.6250000, 127.9875000 26.6291667, 127.9812500 26.6291667, 127.9812500 26.6250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral