メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.27446303083 44.0197825560257, 144.272902447268 44.0196242301039, 144.273009593269 44.0190503516796, 144.27457257025 44.019216392627, 144.27446303083 44.0197825560257)) ^^http://www.opengis.net/ont/geosparql#wktLiteral