メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.656623594299 42.8320678641139, 141.657136754251 42.8328314582924, 141.656437292305 42.8330967122298, 141.655689525554 42.8333762688717, 141.655270930448 42.8335195412037, 141.655247824523 42.8335274387408, 141.654083530347 42.8339371844815, 141.653815931992 42.8335920726953, 141.653549095118 42.8331630572761, 141.653272959661 42.8327772475397, 141.652993973824 42.8323205969587, 141.654163785301 42.8318911272581, 141.655326411516 42.831466882662, 141.656052626598 42.8312003680469, 141.656462059972 42.8318125614903, 141.656623594299 42.8320678641139)) ^^http://www.opengis.net/ont/geosparql#wktLiteral