メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.974894478319 43.5607244847073, 144.974032194142 43.5601557464959, 144.973919973586 43.5600817414684, 144.973811067623 43.5600039985125, 144.975332357658 43.5588226912383, 144.975466826404 43.5589098065095, 144.975963444732 43.5592181162725, 144.976406056123 43.5595123134971, 144.974894478319 43.5607244847073)) ^^http://www.opengis.net/ont/geosparql#wktLiteral