メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.774102507966 35.413162594513, 136.772906937919 35.4132003424261, 136.771669855545 35.413240131149, 136.771634420216 35.4128151038309, 136.772887582244 35.4127753682519, 136.774076500641 35.41273323276, 136.774102507966 35.413162594513)) ^^http://www.opengis.net/ont/geosparql#wktLiteral