メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.256985860785 36.1449481470571, 137.257282423783 36.1449712471633, 137.25763898556 36.1450296020992, 137.257485331881 36.1461715902258, 137.25747629617 36.1461931070502, 137.257455869777 36.1462633250853, 137.25714790815 36.1462599234775, 137.256595454325 36.1461633746541, 137.25624608449 36.1460857887697, 137.256031694038 36.146040092571, 137.256327819027 36.144880027474, 137.256985860785 36.1449481470571)) ^^http://www.opengis.net/ont/geosparql#wktLiteral