メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364861482148 40.5480051507293, 141.364249087882 40.5478549756123, 141.361051696161 40.5468980584994, 141.362165589046 40.5446996603537, 141.362307794609 40.5447267305544, 141.363279012604 40.5449911154083, 141.36414975179 40.5452847301703, 141.36499554833 40.5456072668959, 141.365574910854 40.545903479407, 141.364861482148 40.5480051507293)) ^^http://www.opengis.net/ont/geosparql#wktLiteral