メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.350909012946 43.0715234280492, 141.350775346704 43.0721292488537, 141.350724403259 43.072316588318, 141.350618909278 43.072704508852, 141.349056204904 43.0724921180549, 141.349230919603 43.0719209438501, 141.349370967983 43.0713191832171, 141.350909012946 43.0715234280492)) ^^http://www.opengis.net/ont/geosparql#wktLiteral