メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.967826601107 43.5493879430559, 144.96846115001 43.5498120192929, 144.967519117245 43.5495331521162, 144.967826601107 43.5493879430559)) ^^http://www.opengis.net/ont/geosparql#wktLiteral