メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.349473174989 43.022010794049, 141.349535994411 43.0215293835104, 141.34955594592 43.021403788917, 141.349744315481 43.0211201503193, 141.349843166881 43.0213019590812, 141.349987222636 43.0214206848249, 141.350079818092 43.0215780398024, 141.350603275854 43.0220960601793, 141.349473174989 43.022010794049)) ^^http://www.opengis.net/ont/geosparql#wktLiteral