メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.784835589429 43.2155794935347, 141.785151627766 43.2157025124139, 141.785532948269 43.2162765314385, 141.785638698264 43.2164250714147, 141.784746859881 43.2172207516481, 141.784663920595 43.2171200558294, 141.78441748525 43.216846392856, 141.784099959551 43.2164066740182, 141.783979684016 43.2162911286893, 141.783561282062 43.215966196611, 141.783550241622 43.2159576428807, 141.784177772014 43.2153366546006, 141.784676017998 43.2155293359023, 141.784835589429 43.2155794935347)) ^^http://www.opengis.net/ont/geosparql#wktLiteral