メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.428645437006 43.7980161717767, 142.429033467831 43.7982414582775, 142.42932705998 43.798433222556, 142.429678811934 43.7986629218794, 142.428727490025 43.7994552535348, 142.428413249609 43.7997560592638, 142.427881603857 43.7994525517726, 142.427374729194 43.7991149678136, 142.427360297096 43.7991060060792, 142.426305763526 43.7984518832352, 142.426675237771 43.7981349650153, 142.427259813623 43.7976415289409, 142.427596160743 43.7973447009306, 142.428656838875 43.7980057823212, 142.428645437006 43.7980161717767)) ^^http://www.opengis.net/ont/geosparql#wktLiteral