メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.744258838777 43.1922413842146, 141.744427865759 43.1923286337821, 141.744880739696 43.1925551881579, 141.744195663377 43.1932925856905, 141.743536572538 43.193994860062, 141.74147037534 43.1961309330904, 141.740546716224 43.1956676621394, 141.74024049119 43.195502646759, 141.742994539321 43.1926649460258, 141.743668924303 43.1919369307229, 141.744258838777 43.1922413842146)) ^^http://www.opengis.net/ont/geosparql#wktLiteral