メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.129261443786 42.986475198231, 144.127303287563 42.9855582513026, 144.126504238524 42.9852576913951, 144.127634168407 42.9838085231171, 144.130433486626 42.9851456430725, 144.129776646221 42.9859036106709, 144.129261443786 42.986475198231)) ^^http://www.opengis.net/ont/geosparql#wktLiteral