メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.984001548961 43.5540540624518, 144.983581693457 43.5538267512059, 144.984026494719 43.5534346630923, 144.984427565397 43.5536912878332, 144.984001548961 43.5540540624518)) ^^http://www.opengis.net/ont/geosparql#wktLiteral