メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.840814601094 35.4458338091375, 136.840774233115 35.4460120778195, 136.839687951217 35.444710994603, 136.839088445572 35.4440392216571, 136.838998238683 35.4439386290631, 136.838792481493 35.4436372377424, 136.839336128953 35.4433267150654, 136.84033918945 35.4434997360599, 136.841444647729 35.4436590115895, 136.841064874652 35.4447654482799, 136.840814601094 35.4458338091375)) ^^http://www.opengis.net/ont/geosparql#wktLiteral