メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.746107070896 43.1910193365719, 141.745561927192 43.1914356043547, 141.745114741162 43.1917854194667, 141.744427865759 43.1923286337821, 141.744258838777 43.1922413842146, 141.743668924303 43.1919369307229, 141.743277470283 43.1917348358333, 141.743835809187 43.1911429567537, 141.744253167123 43.1907217026411, 141.744670702422 43.1902782236039, 141.746107070896 43.1910193365719)) ^^http://www.opengis.net/ont/geosparql#wktLiteral