メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.378906625886 36.0444000670298, 139.377343611204 36.0447605532291, 139.377896365457 36.0432536664162, 139.378501230614 36.0415621473193, 139.379322365767 36.0414270752904, 139.379412096323 36.0414126538744, 139.378999346723 36.0438390470738, 139.378906625886 36.0444000670298)) ^^http://www.opengis.net/ont/geosparql#wktLiteral