メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.344578483879 43.1049013910326, 141.344542363576 43.1051706743527, 141.344524471779 43.1053035947815, 141.344489387403 43.1056261955803, 141.3429656942 43.1055769700792, 141.343003087019 43.1050985408906, 141.343001052721 43.1048981589541, 141.343028803617 43.1043900444339, 141.344640856693 43.1044529071673, 141.344578483879 43.1049013910326)) ^^http://www.opengis.net/ont/geosparql#wktLiteral