メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.278212572559 44.0212024802888, 144.277600423418 44.0217682824486, 144.277573298979 44.0218586703589, 144.275702488645 44.0216748901588, 144.275820359925 44.0210961750846, 144.275841633865 44.0209655859359, 144.277031598058 44.0210901608381, 144.278212572559 44.0212024802888)) ^^http://www.opengis.net/ont/geosparql#wktLiteral