メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.774124525978 35.4135897593207, 136.772926251373 35.4136340489077, 136.771678452578 35.4136738020831, 136.771669855545 35.413240131149, 136.772906937919 35.4132003424261, 136.774102507966 35.413162594513, 136.774124525978 35.4135897593207)) ^^http://www.opengis.net/ont/geosparql#wktLiteral