メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.984665086188 43.5515357191044, 144.98428987093 43.5513031920997, 144.984970868195 43.5507173428753, 144.985008515536 43.5506861690908, 144.985267014232 43.5508563025024, 144.98538719288 43.550935381083, 144.985346804243 43.5509658123705, 144.984665086188 43.5515357191044)) ^^http://www.opengis.net/ont/geosparql#wktLiteral