メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.410154041152 43.7423066638425, 142.41024324772 43.7428057143866, 142.40887577475 43.7428873418314, 142.408001616772 43.7429423182025, 142.407455917677 43.7429699597652, 142.406883733988 43.7430014682386, 142.406192266984 43.7430081705181, 142.40614859234 43.7425088090404, 142.406094407735 43.7420478927635, 142.4067777863 43.7419893406383, 142.407673187134 43.7419573926284, 142.410100297625 43.7418310524626, 142.410154041152 43.7423066638425)) ^^http://www.opengis.net/ont/geosparql#wktLiteral