メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.5437500 34.8208334, 133.5500000 34.8208334, 133.5500000 34.8250000, 133.5437500 34.8250000, 133.5437500 34.8208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral