メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.889697868321 36.9518541167162, 140.888712256661 36.9515188125536, 140.888447196488 36.9514240103912, 140.88888477675 36.9508982441308, 140.889274175902 36.9504475991894, 140.890989505559 36.950772891789, 140.890728036209 36.9513087178747, 140.89067667978 36.9514140017674, 140.890017571397 36.9512594125809, 140.889940223256 36.9515094621533, 140.889877795314 36.9515495819248, 140.889697868321 36.9518541167162)) ^^http://www.opengis.net/ont/geosparql#wktLiteral