メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.012996208312 34.9945238204086, 137.01289612904 34.9949690697444, 137.010957224167 34.994520804094, 137.011099145978 34.9940811036078, 137.011391682649 34.993164387121, 137.013244732226 34.9935452782298, 137.01305115671 34.994340569604, 137.012996208312 34.9945238204086)) ^^http://www.opengis.net/ont/geosparql#wktLiteral