メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.99242884131 43.5586244222323, 144.992067868065 43.5584260700571, 144.991792652996 43.5582764992768, 144.991662898286 43.5582042321504, 144.992096405016 43.557857773532, 144.992229913084 43.5579487598844, 144.992802921303 43.5583192934845, 144.99242884131 43.5586244222323)) ^^http://www.opengis.net/ont/geosparql#wktLiteral