メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.392433911265 44.1729282030224, 142.390699002514 44.1726540293158, 142.390869423191 44.172097177005, 142.390882070677 44.1720186336119, 142.391004666041 44.1716247457948, 142.392748230148 44.1719054081434, 142.392433911265 44.1729282030224)) ^^http://www.opengis.net/ont/geosparql#wktLiteral