メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.902257075626 43.3345736219449, 141.901427974005 43.3349881208889, 141.901493971142 43.3350393793568, 141.900341435674 43.3356722562468, 141.900108524252 43.3348244259602, 141.899863894586 43.3340381699922, 141.902020228063 43.3337154431978, 141.904331426631 43.3333795612742, 141.9044714887 43.3333730151252, 141.902263919015 43.3345983987752, 141.902257075626 43.3345736219449)) ^^http://www.opengis.net/ont/geosparql#wktLiteral