メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.959768375753 43.5463154639816, 144.960124167992 43.5465574632698, 144.959357989237 43.5471842079372, 144.958978786883 43.5469246194577, 144.958803507226 43.5470646656163, 144.958363267848 43.5467417239371, 144.959302053187 43.5459972931055, 144.959768375753 43.5463154639816)) ^^http://www.opengis.net/ont/geosparql#wktLiteral