メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.782696871939 35.4132463248779, 136.782135259359 35.4132607806374, 136.782130313831 35.413306149914, 136.779601995689 35.413358717977, 136.77950357841 35.4129732441384, 136.782678829741 35.4128698048459, 136.78269542134 35.4130986856389, 136.782696871939 35.4132463248779)) ^^http://www.opengis.net/ont/geosparql#wktLiteral