メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.406982804798 43.0016567768329, 144.407957293809 43.0022978802182, 144.407412302774 43.0024568968443, 144.407296993977 43.0024912799533, 144.406616167246 43.0027006052578, 144.406140895283 43.0023935717391, 144.405596998497 43.002042044987, 144.406470423552 43.0013240713833, 144.406982804798 43.0016567768329)) ^^http://www.opengis.net/ont/geosparql#wktLiteral