メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347096793561 43.0517423009469, 141.347825163204 43.051846157973, 141.347678959992 43.0524188961842, 141.347522015888 43.0529912673199, 141.345946792854 43.0527850005799, 141.345953375778 43.0527612102697, 141.345987358888 43.0526283452418, 141.346108457979 43.0521989543369, 141.346113762914 43.0521773342324, 141.346206027929 43.0517979313201, 141.34624593564 43.0516337446772, 141.346701836156 43.0516929062579, 141.346837755919 43.051710506566, 141.347096793561 43.0517423009469)) ^^http://www.opengis.net/ont/geosparql#wktLiteral