メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.129261443786 42.986475198231, 144.12863062092 42.9871887069214, 144.127587292131 42.988362111028, 144.126791902488 42.9892663688942, 144.126281879533 42.9862050119575, 144.125815458267 42.9860695399462, 144.126504238524 42.9852576913951, 144.127303287563 42.9855582513026, 144.129261443786 42.986475198231)) ^^http://www.opengis.net/ont/geosparql#wktLiteral