メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.401693375551 43.1283161476445, 141.402104203493 43.1284864030789, 141.402544211578 43.1286506153693, 141.403536609768 43.1291161058049, 141.403214954049 43.1294280871285, 141.403187119725 43.1294550271067, 141.402877051416 43.1297551385303, 141.402581625817 43.1300445975696, 141.402316587492 43.1303238046523, 141.401362306356 43.1298023954702, 141.400255308594 43.1291947276157, 141.400520840866 43.1289147537992, 141.400802453278 43.1286036740525, 141.401260325402 43.1280865040107, 141.401663444035 43.1283003094846, 141.401693375551 43.1283161476445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral