メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.708549931113 44.3685954507546, 141.70850982582 44.3686235264635, 141.708066842844 44.3689336185909, 141.707518671345 44.3692492863057, 141.705399387372 44.3675721393932, 141.705552872722 44.3674046105586, 141.705835817931 44.3670914791458, 141.706134565558 44.3667545499085, 141.70618677584 44.3666947148628, 141.708579117628 44.3685768148601, 141.708549931113 44.3685954507546)) ^^http://www.opengis.net/ont/geosparql#wktLiteral