メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.389251828607 43.7713368197659, 142.389239077509 43.7718466007642, 142.389176711596 43.7725840747668, 142.389177436007 43.7726497721607, 142.387427155434 43.772585886537, 142.387455764849 43.7717124684403, 142.387504214609 43.7712707694009, 142.387504594986 43.7712676572191, 142.387530238664 43.7707837046118, 142.389278535608 43.770847221599, 142.389251828607 43.7713368197659)) ^^http://www.opengis.net/ont/geosparql#wktLiteral