メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.398641730108 43.7490046927905, 142.398653419452 43.7490973796932, 142.398695211614 43.7494987033616, 142.396647554438 43.7496067999412, 142.394656232164 43.7497124580999, 142.394611040521 43.749214165156, 142.394568446577 43.7487466150305, 142.39654642084 43.7486431370851, 142.398590830598 43.7485291914908, 142.39863546502 43.7489072697066, 142.398641730108 43.7490046927905)) ^^http://www.opengis.net/ont/geosparql#wktLiteral