メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.257574439115 36.1429876090978, 137.25798741699 36.1431276002132, 137.25769520425 36.1446955660709, 137.25763898556 36.1450296020992, 137.257282423783 36.1449712471633, 137.256985860785 36.1449481470571, 137.256327819027 36.144880027474, 137.256825935715 36.1437537155938, 137.257045984859 36.143353577039, 137.257089131402 36.1428614826624, 137.257392802097 36.1429371564778, 137.257574439115 36.1429876090978)) ^^http://www.opengis.net/ont/geosparql#wktLiteral