メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.308407622115 34.8517167939523, 138.308614461257 34.85280519896, 138.308326687959 34.8528737118302, 138.308156842289 34.8523241967867, 138.308037475806 34.8519818831861, 138.308039833894 34.8517462390602, 138.30800741175 34.8508113453176, 138.308353314338 34.8507968678179, 138.308407622115 34.8517167939523)) ^^http://www.opengis.net/ont/geosparql#wktLiteral