メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.382536074871 43.8292335568398, 142.382478841574 43.8292794717844, 142.381917511773 43.8289721241223, 142.378416157479 43.828007552198, 142.377868626366 43.827837384556, 142.379379079652 43.8268039834788, 142.38003174895 43.827239872592, 142.380733144158 43.8277109367005, 142.382536074871 43.8292335568398)) ^^http://www.opengis.net/ont/geosparql#wktLiteral