メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.871186103471 43.0106221261964, 142.870242631627 43.011442699302, 142.868929903225 43.0106497964852, 142.868817953304 43.0105814080778, 142.869239797894 43.0102172858836, 142.869717033876 43.009786824694, 142.869768554871 43.0097403399967, 142.871186103471 43.0106221261964)) ^^http://www.opengis.net/ont/geosparql#wktLiteral