メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.337288867584 43.0474156991165, 141.337271301612 43.0475850533435, 141.337206646117 43.0480909113357, 141.335516901372 43.0479748043243, 141.33559528276 43.0472947097858, 141.335645530537 43.0468687024017, 141.335651769087 43.0468102379605, 141.337356831674 43.0469258319061, 141.337314971075 43.0472462014473, 141.337288867584 43.0474156991165)) ^^http://www.opengis.net/ont/geosparql#wktLiteral