メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.108749696592 43.8241460433647, 144.108254813655 43.8243111241579, 144.107531560021 43.8245224449425, 144.10749286636 43.8244585919842, 144.106878802251 43.8234431274197, 144.108094286316 43.8234012157469, 144.108212380421 43.8235260975083, 144.108466922722 43.8237850020223, 144.108621932744 43.8239100735548, 144.108751753916 43.8240747234654, 144.108795839198 43.8241306475318, 144.108749696592 43.8241460433647)) ^^http://www.opengis.net/ont/geosparql#wktLiteral