メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.5437500 33.5250000, 132.5500000 33.5250000, 132.5500000 33.5291667, 132.5437500 33.5291667, 132.5437500 33.5250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral