メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.35707812506 43.7546508982392, 142.35757996414 43.7549944497312, 142.35796090762 43.7547079323561, 142.35845786533 43.7550381054216, 142.358080496802 43.7553509564305, 142.357449441826 43.7558095955192, 142.357066103351 43.7561053251263, 142.356543778007 43.7565124678799, 142.356311407736 43.7566718586252, 142.355808541324 43.7563398006268, 142.35531219237 43.7559935287876, 142.354818014879 43.7556456883661, 142.355541497323 43.7550588180131, 142.356571850806 43.7543041488173, 142.35707812506 43.7546508982392)) ^^http://www.opengis.net/ont/geosparql#wktLiteral