メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.320998067734 43.0651217969148, 141.320899296349 43.0654373339548, 141.320852669911 43.0656853573433, 141.320727903626 43.0662101222376, 141.320006840614 43.0661162124545, 141.319407803567 43.0660405908739, 141.319330833174 43.066024281383, 141.319507881835 43.065303513837, 141.319610072841 43.064933641226, 141.320277393133 43.0650283834671, 141.320414919208 43.0650426529322, 141.320998067734 43.0651217969148)) ^^http://www.opengis.net/ont/geosparql#wktLiteral