メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.188205783867 35.3646146082649, 137.188100764256 35.3651408254445, 137.18713021361 35.3647731646723, 137.186781963718 35.36463758453, 137.187147154785 35.3640421020328, 137.187389795964 35.3636294561542, 137.187656971522 35.3632072975863, 137.187733919456 35.3631144683493, 137.188424446914 35.3635469605608, 137.188205783867 35.3646146082649)) ^^http://www.opengis.net/ont/geosparql#wktLiteral