メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.478749697709 40.6027259834244, 140.479266437298 40.6038287062116, 140.479664752857 40.6047213906645, 140.478955041336 40.6048887128108, 140.47849878241 40.6049962978841, 140.478140704683 40.6041130921687, 140.477689795522 40.603020558334, 140.47736499356 40.6022201207135, 140.477263587466 40.602254353873, 140.477217704521 40.602155144319, 140.477261740089 40.6021288253996, 140.477713300834 40.60184244103, 140.47787733352 40.6017184069317, 140.47818696535 40.6015256567328, 140.478749697709 40.6027259834244)) ^^http://www.opengis.net/ont/geosparql#wktLiteral