メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.415896227819 43.7958239570301, 142.416235670459 43.7960368590441, 142.416415296088 43.7961462481594, 142.416555296877 43.7962405227832, 142.416914522459 43.7964525496723, 142.415779520243 43.7974132097535, 142.415430754367 43.7971969275842, 142.415097135875 43.7969848593708, 142.414772841226 43.7967778407796, 142.413688064324 43.7961046157399, 142.414058671842 43.7957979113831, 142.414408329709 43.7954912340275, 142.414849323219 43.7951442902487, 142.415385260471 43.795483931133, 142.415896227819 43.7958239570301)) ^^http://www.opengis.net/ont/geosparql#wktLiteral