メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.1312500 33.2583333, 129.1375000 33.2583333, 129.1375000 33.2625000, 129.1312500 33.2625000, 129.1312500 33.2583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral