メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.750654552613 43.2084668408207, 141.749318136299 43.2098867600252, 141.748756632583 43.2105199971292, 141.748670400282 43.2104831902229, 141.748166747688 43.2102337796611, 141.748691209065 43.2095688070408, 141.74874614655 43.2094763543465, 141.748966201284 43.2092506526917, 141.749479222138 43.2087244525321, 141.750033633431 43.2081557423129, 141.750193207795 43.2082356989392, 141.750450402464 43.2083645373016, 141.750654552613 43.2084668408207)) ^^http://www.opengis.net/ont/geosparql#wktLiteral