メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.885764479897 43.0152500796504, 142.885305403528 43.0149672969746, 142.885038016036 43.0148009017269, 142.88507022239 43.0147734351746, 142.886045608135 43.0139349795844, 142.886703414859 43.0143393107704, 142.886773295689 43.0143822457652, 142.886568695914 43.0145601191283, 142.885790695534 43.0152272182962, 142.885764479897 43.0152500796504)) ^^http://www.opengis.net/ont/geosparql#wktLiteral