メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.385391225939 42.984065901861, 144.383794281947 42.9837840395829, 144.383985339481 42.9831824818139, 144.385584525171 42.9834686621073, 144.385391225939 42.984065901861)) ^^http://www.opengis.net/ont/geosparql#wktLiteral