メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.768226880832 43.1990560006237, 141.767307644761 43.1985843759917, 141.767998022791 43.1978650161798, 141.768920713475 43.1983243433234, 141.768226880832 43.1990560006237)) ^^http://www.opengis.net/ont/geosparql#wktLiteral