メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((128.2312500 26.7625000, 128.2375000 26.7625000, 128.2375000 26.7666667, 128.2312500 26.7666667, 128.2312500 26.7625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral