メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.614810138908 35.4301651142896, 136.61383650387 35.4316138213076, 136.609869292399 35.429974295991, 136.610369599368 35.4292690997518, 136.611329218478 35.4296362238681, 136.611783066036 35.4288346534281, 136.614810138908 35.4301651142896)) ^^http://www.opengis.net/ont/geosparql#wktLiteral