メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.1437500 26.3625000, 127.1500000 26.3625000, 127.1500000 26.3666667, 127.1437500 26.3666667, 127.1437500 26.3625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral