メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.3562500 26.2041667, 127.3625000 26.2041667, 127.3625000 26.2083333, 127.3562500 26.2083333, 127.3562500 26.2041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral