メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.696771583076 44.3638349809804, 141.696197827434 44.3642015916328, 141.695117621902 44.3633738010663, 141.695706426393 44.3629911278738, 141.696771583076 44.3638349809804)) ^^http://www.opengis.net/ont/geosparql#wktLiteral